Journal of Pathology and Translational Medicine

Woo Sung Moon

53 Articles

Intrathyroidal Thymic Tissue in an Adult.: Woo Sung Moon, Seung Bae Hwang, Ki Hwan Hong; Korean J Pathol. 2011;45(5):547-548.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.5.547

3,715 View
38 Download
2 Crossref

Abstract PDF

No abstract available.

Citations

Citations to this article as recorded by

Ectopic intrathyroidal thymic tissue in an adult patient: a case report and review of the literature
Sadegh Moradian, Sina Delazar, Farzad Yazdani, Maryam Mohammadzadeh
Journal of Medical Case Reports.2022;[Epub] CrossRef
Study of intrathyroid fat-containing lesions using CT imaging with literature review
Ki Hwan Kim, Hyung Suk Seo, Young Hen Lee, Ki Yeol Lee, Young-Sik Kim, Gil Soo Son, Sang-il Suh
Neuroradiology.2013; 55(11): 1405. CrossRef

Simultaneous Pancreatic Serous Microcystic Adenoma and Intraductal Papillary Mucinous Tumor of the Pancreas: A Case Report.: Hyoung Jong Kwak, Young Kon Kim, Baik Hwan Cho, Woo Sung Moon; Korean J Pathol. 2011;45:S29-S31.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S29

2,685 View
22 Download

Abstract PDF: Serous cystadenomas of the pancreas account for approximately a third of pancreatic cystic neoplasms. Their coexistence with a second tumor is extremely rare. We now report a case of a serous microcystic adenoma combined with an intraductal papillary mucinous tumor of the pancreas in a 69-year-old man. Abdominal computed tomography scans demonstrated an incidental cystic mass in the body with cystic dilatation of the duct in the head of the pancreas. Central pancreatectomy with pancreatico-jejunostomy, and cyst excision of the pancreatic head were performed. Histologic examination demonstrated a serous microcystic cystadenoma in the body coexisting with an intraductal papillary mucinous adenoma in the head of the pancreas. This case study highlights the importance of careful intra-operative and pathologic examination for synchronous pancreatic tumors.

In Situ Follicular Lymphoma Developed after Hodgkin Lymphoma.: Ho Sung Park, Sang Jae Noh, Jae Yong Kwak, Eun Kee Song, Myung Hee Sohn, Ho Lee, Woo Sung Moon, Kyu Yun Jang; Korean J Pathol. 2011;45:S53-S57.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S53

2,848 View
20 Download

Abstract PDF: In situ follicular lymphoma is a newly defined entity among the lymphoid neoplasms and is defined as architecturally normal-appearing lymph nodes and other lymphoid tissues that have one or more follicles that demonstrate bcl-2 overexpressing centrocytes and centroblasts, with or without a monomorphic cytologic appearance suggestive of follicular lymphoma. Here we present a case of in situ follicular lymphoma diagnosed during the follow-up after a complete response to the treatment of lymphocyte-rich classical Hodgkin's lymphoma. In our case, because only a few germinal centers contained bcl-2 overexpressing cells, we missed the diagnosis of in situ follicular lymphoma in the initial histological examination. We could establish the diagnosis only after performing bcl-2 immunostaining in the sequential biopsy. Therefore, we recommend that careful histological examination along with bcl-2 immunostaining is needed in patients with suspicious clinical findings.

Solitary Fibrous Tumor of the Liver: A Case Report.: Hee Chul Yu, Baik Hwan Cho, Young Kon Kim, Sang Jae Noh, Woo Sung Moon; Korean J Pathol. 2010;44(5):536-539.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.5.536

3,160 View
21 Download
1 Crossref

Abstract PDF

Solitary fibrous tumor is an uncommon neoplasm of mesenchymal origin that primarily affects the pleura. This tumor has been rarely found in liver parenchyma. We present an additional case of a solitary fibrous tumor in the liver of a 46-year-old woman. A contrast-enhanced magnetic resonance image revealed a well-defined round hepatic mass with strong homogeneous enhancement on arterial phase imaging. The tumor was composed of cytologically bland spindle cells with alternating hypercellular and hypocellular sclerotic areas. Immunohistochemistry indicated that the tumor cells were positive for vimentin, CD34, CD99 and smooth muscle actin, but negative for cytokeratin, human melanoma black 45, CD117, bcl-2, and S-100 protein.

Citations

Citations to this article as recorded by

Meningeal Solitary Fibrous Tumors with Delayed Extracranial Metastasis
Nayoung Han, Hannah Kim, Soo Kee Min, Sun-Ha Paek, Chul-Kee Park, Seung-Hong Choi, U-Ri Chae, Sung-Hye Park
Journal of Pathology and Translational Medicine.2016; 50(2): 113. CrossRef

Fine Needle Aspiration Cytology of Gastric Glomus Tumor: A Case Report.: Dong Geun Lee, Kyu Yun Jang, Myoung Ja Chung, Woo Sung Moon, Myoung Jae Kang, Ho Sung Park; Korean J Pathol. 2010;44(4):448-452.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.4.448

3,229 View
41 Download
2 Crossref

Abstract PDF

Glomus tumors of the stomach are rare and are usually found as a solitary, intramural lesion. Here, we report a case of a gastric glomus tumor in a 60-year-old woman diagnosed by endoscopic ultrasound-guided fine-needle aspiration cytology. Endoscopic ultrasound revealed a 4 x 3 cm-sized, round, isoechoic mass at the fourth layer of the gastric wall. Smears revealed cohesive clusters of small, uniform, round to polygonal cells with scant cytoplasm and round, hyperchromatic nuclei with homogeneous chromatin. Immunocytochemistry by liquid-based cytology was positive for smooth muscle actin. The cytologic diagnosis of a glomus tumor was confirmed by a specimen from the laparoscopic resection. Although the cytologic features of glomus tumors are quite distinctive, an immunocytochemical stain from a liquid-based cytology preparation can further help to ascertain the diagnosis.

Citations

Citations to this article as recorded by

Glomus Tumor of the Stomach: A Systematic Review and Illustrative Case Report
Andrea Pansa, Laura Samà, Laura Ruspi, Federico Sicoli, Ferdinando Carlo Maria Cananzi, Vittorio Quagliuolo
Digestive Diseases.2023; 41(1): 17. CrossRef
Cytologic analysis of a glomus tumor in the left second toe: Case report
Jay Hwang, Susan McDowell, Bradley Cole, Aaron Huber, Maria Cecilia D. Reyes
Diagnostic Cytopathology.2022;[Epub] CrossRef

Quality Control Program for Fresh Frozen Tissue and Its Results of Chonbuk National University Hospital National Biobank of Korea.: Shin Young Park, Hyun Ah Baek, Hyoung Jong Kwak, Sang Hyun Hong, Ho Sung Park, Kyu Yun Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee, Myoung Ja Chung; Korean J Pathol. 2010;44(3):295-301.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.3.295

3,941 View
42 Download
1 Crossref

Abstract PDF

BACKGROUND
Molecular tools for tissue profiling generally require collection of fresh frozen tissues (FFT) as sources of high-quality DNA and RNA. Nowadays, researchers carry out large-scale, multi-center studies and they request inter-institutional minimal intrinsic bias, some fundamental similarities, and the same standardized and validated procedures.
METHODS
This study reports standardized quality control procedure for fresh frozen tissue of the National Biobank of Korea.
RESULTS
The main procedures for quality control for FFT are as follows: records related to sample collection such as labeling of samples, transport temperature, lag time from excision of tissue to freezing, and sample size were reviewed for all fresh frozen samples. The stability of RNA and DNA in fresh frozen tissue was evaluated for 3% of collected samples and purity was assessed (ratio of the absorbance at 260 and 280 nm) as was integrity (agarose gel electrophoresis). Stained hematoxylin and eosin sections were reviewed by a pathologist to confirm the diagnosis and to assess how representative the frozen sample was.
CONCLUSIONS
We introduced that the quality-control criteria for fresh frozen tissue of the NBK. We expect that this study contributes to standardization of collection, storage, and quality control of fresh frozen tissue.

Citations

Citations to this article as recorded by

Influence of Cold Ischemia Time and Storage Period on DNA Quality and Biomarker Research in Biobanked Colorectal Cancer Tissues
Min Gyoung Pak, Mee Sook Roh
Kosin Medical Journal.2020; 35(1): 26. CrossRef

The Prognostic Significance of the Tumor-Infiltrating FoxP3-Positive Regulatory T Cells in Gastric Carcinoma.: Sang Jae Noh, Shin Young Park, Kyung Ryoul Kim, Chan Young Kim, Keun Sang Kwon, Ho Sung Park, Ho Lee, Myoung Ja Chung, Woo Sung Moon, Kyu Yun Jang; Korean J Pathol. 2010;44(1):9-15.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.1.9

3,369 View
31 Download
2 Crossref

Abstract PDF

BACKGROUND
Regulatory T cells (Tregs) are known to be key regulators of immune responses in patients with autoimmune disease and infection and also for attenuating antitumor immunity by the host. It has been reported that high numbers of tumor-infiltrating Tregs might be associated with poor clinical outcomes for several malignant tumors. Therefore, this study aimed to examine the impact of tumor-infiltrating Tregs on the prognosis of gastric carcinoma patients.
METHODS
The immunohistochemical staining for anti-fork head Box P3 (FoxP3) antibody was performed by using a 3 mm core from the tumor specimens of each of the 173 gastric cancer patients for constructing a tissue microarray. FoxP3-positive Tregs were quantified by calculating the numbers of positive cells per 5 high-power fields on light microscopy. Thereafter, the 173 patients were subdivided into the low Tregs group (< or = 3/5 high power fields [HPF], n = 41) and the high Tregs group (> 3/5 HPF, n = 132).
RESULTS
The high Tregs group was significantly associated with a higher stage, more invasion depth and lymph node metastasis (p = 0.009, p = 0.036, p = 0.006, respectively). The high Tregs group showed significantly poorer overall survival and event-free survival (p = 0.004, p = 0.017, respectively) on the univariate analysis. The Tregs group and the tumor, node and metastasis stage were also independent prognostic factors that were significantly associated with overall survival (p = 0.025, p < 0.001, respectively) by multivariate analysis.
CONCLUSIONS
Our results indicated that a high number of tumor-infiltrating FoxP3-positive Tregs could be an indicator of poor long term survival for gastric carcinoma patients.

Citations

Citations to this article as recorded by

Tumor-infiltrating PD1-Positive Lymphocytes and FoxP3-Positive Regulatory T Cells Predict Distant Metastatic Relapse and Survival of Clear Cell Renal Cell Carcinoma
Myoung Jae Kang, Kyoung Min Kim, Jun Sang Bae, Ho Sung Park, Ho Lee, Myoung Ja Chung, Woo Sung Moon, Dong Geun Lee, Kyu Yun Jang
Translational Oncology.2013; 6(3): 282. CrossRef
Significance of Foxp3 Positive Regulatory T Cell and Tumor Infiltrating T Lymphocyte in Triple Negative Breast Cancer
Hanna Kang, Harin Cheong, Min Sun Cho, Heasoo Koo, Woon Sup Han, Kyung Eun Lee, Byung In Moon, Sun Hee Sung
The Korean Journal of Pathology.2011; 45(1): 53. CrossRef

Expression and Prognostic Significance of Serum Response Factor in Cholangiocarcinoma.: Shin Young Park, Kyu Yun Jang, Yo Na Kim, Hee Jin Kim, Ho Sung Park, Myoung Ja Chung, Hee Chul Yu, Baik Hwan Cho, Kyoung Ryul Kim, Woo Sung Moon; Korean J Pathol. 2009;43(6):517-522.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.6.517

3,297 View
18 Download
2 Crossref

Abstract PDF

BACKGROUND
Serum response factor (SRF) is a transcriptional factor that plays an important role in cell growth and differentiation for several types of cells. The expression of SRF in cholangiocarcinoma (CC) and its potential role has not been examined. The aim of this study was to determine the relationship between the expression of SRF in CC and the clinicopathological parameters, as well as patient survival.
METHODS
We analyzed the expression of SRF in 84 surgically resected cases of CC (33 cases of intrahepatic CC [ICC] and 51 cases of extrahepatic CC [ECC]) by using immunohistochemistry. RESULTS: The positive expression of SRF was detected in 48.8% of the cases of CC (42.4% in ICC, 52.9% in ECC). SRF was predominantly expressed in the CC cells with intense labeling in the nucleus. A SRF expression was significantly associated with the cell proliferation rate (Ki-67 labeling index, p=0.046) and poor patient survival (p=0.002). The tumor differentiation (p=0.038), the T category (p<0.001), lymph node and distant metastasis (p<0.001, p=0.009) and nerve and vessel invasion (p=0.010, p=0.012) were also found to be significantly associated with a poor CC prognosis. CONCLUSIONS: These results suggest that the SRF may play a role in the tumor cell proliferation of CC, and its expression in tumor cells can provide additional prognostic information.

Citations

Citations to this article as recorded by

Serum response factor induces epithelial to mesenchymal transition with resistance to sorafenib in hepatocellular carcinoma
JUN SANG BAE, SANG JAE NOH, KYOUNG MIN KIM, KYU YUN JANG, MYOUNG JA CHUNG, DAE GOHN KIM, WOO SUNG MOON
International Journal of Oncology.2014; 44(1): 129. CrossRef
Clinicopathologic significance of serum response factor expression in colorectal adenocarcinomas
Se Min Jang, Young Jin Jun, Hulin Han, Kang Hong Lee, Ki-Seok Jang, Seung Sam Paik
Basic and Applied Pathology.2011; 4(2): 46. CrossRef

The Expressions of Nerve Growth Factor and Its Receptor p75NGFR in Hepatocellular Carcinoma: Their Relation with the Clinicopathologic Factors.: Woo Sung Moon, Kyu Yun Jang, Myoung Ja Chung, Myoung Jae Kang, Dong Geun Lee, Ho Lee, Ho Sung Park; Korean J Pathol. 2009;43(2):145-151.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.2.145

3,334 View
19 Download
1 Crossref

Abstract PDF

BACKGROUND
Nerve growth factor (NGF) has been suggested to participate in tumor progression and it can interact with its receptor p75NGFR. In the present study, we investigated the expressions of NGF and p75NGFR in hepatocellular carcinoma (HCC).
METHODS
We performed immunohistochemistry for NGF, p75NGFR and PCNA in 45 cases of HCCs, and examined the relationships between the clinicopathologic factors and the immunohistochemical results.
RESULTS
NGF was detected in 84.4% (38/45) of the tumor cells and in 64.4% (29/45) of the non-tumorous hepatocytes. Furthermore, a NGF expression was present in 28.9% (13/45) of the endothelial cells in the HCCs, but in 80% (36/45) of the endothelial cells in the non-tumor liver tissue. The tumor cells were negative for p75NGFR in all the HCCs. Although a p75NGFR expression was present in all the nerve fibers in the non-tumor liver tissues, it was markedly reduced (42.2%; 19/45) in the HCCs and a p75NGFR expression was observed at the sinusoids or around the large vessels. The HCCs expressing NGF, either in the tumor cells or the endothelial cells, showed a larger size than those HCCs that didn't express NGF. The NGF positive tumors showed a tendency toward a higher PCNA-labeling index than did the negative tumors.
CONCLUSIONS
The changed localization of the NGF expression and the decreased expression of p75NGFR are associated with hepatic carcinogenesis. We suggest that a NGF expression may contribute to the progression of HCC.

Citations

Citations to this article as recorded by

Expression of nerve growth factor and heme oxygenase-1 predict poor survival of breast carcinoma patients
Sang Jae Noh, Jun Sang Bae, Urangoo Jamiyandorj, Ho Sung Park, Keun Sang Kwon, Sung Hoo Jung, Hyun Jo Youn, Ho Lee, Byung-Hyun Park, Myoung Ja Chung, Woo Sung Moon, Myoung Jae Kang, Kyu Yun Jang
BMC Cancer.2013;[Epub] CrossRef

Intraosseous Neurilemmoma of the Mandible: A Case Report.: Kyu Yun Jang, Woo Sung Moon, Ho Sung Park; Korean J Pathol. 2009;43(1):88-91.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.1.88

2,539 View
22 Download
4 Crossref

Abstract PDF

Neurilemmoma (Schwannoma) is a benign nerve sheath tumor that's composed entirely of well-differentiated Schwann cells. Intraosseous neurilemmomas are rare and they represent less than 1% of all benign primary bone tumors. We report here on an additional case of intraosseous neurilemmoma that was located in the mandible of a 77-year-old woman. CT revealed an expansile, well-defined lesion on the right side of the mandibular body with thinning of the cortex. The lesion was surgically removed and it was found to be a 2x1.7 cm-sized, bright yellowish, hard mass with hemorrhage and cyst formation. Histologically, the mass was a moderately cellular neoplasm and it showed distinct nuclear palisading, numerous Verocay bodies and tumor cells that were positively immunohistostained for S-100 protein. Two months after the operation, the patient has remained in a good condition with no signs or symptoms of tumor recurrence.

Citations

Citations to this article as recorded by

Imaging Features of Intraosseous Schwannoma: A Case Series and Review of the Literature
Firoozeh Shomal Zadeh, Arash Azhideh, Jose G. Mantilla, Vijaya Kosaraju, Nitin Venugopal, Cree M. Gaskin, Atefe Pooyan, Ehsan Alipour, Majid Chalian
Diagnostics.2023; 13(9): 1610. CrossRef
Gnathic Schwannomas: A Report of Two Cases and Systematic Review of the Literature
Alberto Jose Peraza Labrador, Luciano Hermios Matos Valdez, Nestor Ricardo Gonzalez Marin, Karem Annelise Rodriguez Ibazetta, Marcelo Villacis, Joan Lopez Chacon, Hebert Ochoa Huaman, Harold Cuzcano Pariahuamán, Hosting Barría Angulo, Victoria Woo
Head and Neck Pathology.2023; 17(4): 984. CrossRef
Intraosseous schwannoma of the humerus: a rarity yet warrants consideration
Jagannath Kamath, Harshit Bhaskar Shetty, Arkesh Madegowda, Anusha S Bhatt
BMJ Case Reports.2021; 14(9): e240007. CrossRef
Intraosseous Schwannoma of the Jaws: An Updated Review of the Literature and Report of 2 New Cases Affecting the Mandible
Dru Perkins, Tudor I. Stiharu, James Q. Swift, Tran Volong Dao, Gisele N. Mainville
Journal of Oral and Maxillofacial Surgery.2018; 76(6): 1226. CrossRef

Expression of Claudin-1, p53 and E-cadherin in Pseudoepitheliomatous Hyperplasia and Squamous Cell Carcinoma of the Head and Neck.: Keum Ha Choi, Jae Hong Lim, Ju Hyung Lee, Keun Sang Kwon, Ho Lee, Ho Sung Park, Myoung Ja Chung, Woo Sung Moon, Jae Soon Eun, Dong Geun Lee, Kyu Yun Jang; Korean J Pathol. 2008;42(5):287-293.

1,958 View
19 Download

Abstract PDF: BACKGROUND
Pseudoepitheliomatous hyperplasia (PEH) is a reactive proliferation of surface epithelium and can be confused with invasive squamous cell carcinoma (SCC) in head and neck biopsy specimens. To distinguish PEH from invasive SCC, immunohistochemical staining for claudin-1, E-cadherin and p53 was performed. METHODS: Eighteen cases of PEH and 29 invasive SCC from head and neck lesions were immunostained and examined. RESULTS: The invasive SCC showed increased staining of claudin-1 (p<0.001) and p53 (p<0.001) and decreased staining of E-cadherin (p=0.005) compared to the PEH specimens. The combined score calculated by adding the positive sum of claudin-1 and p53 and subtracting E-cadherin was useful for the differentiation of SCC from PEH (89.7% sensitivity and 88.9% specificity, p<0.001). CONCLUSION: The combined immunostaining for claudin-1, p53 and E-cadherin may help differentiate PEH from invasive SCC. The results of this study suggest that the increased expression of claudin-1 and p53 and the decreased expression of E-cadherin maybe markers for the aggressive growth of invasive SCC.

Correlation of the Nuclear beta-catenin Expression with the Clinicopathological Parameters of Hepatocellular Carcinoma.: Hyoung Jong Kwak, Ha Na Choi, Sung Ho Hwang, Keum Ha Choi, Ho Sung Park, Kyu Yun Jang, Myoung Ja Chung, Myoung Jae Kang, Dong Geun Lee, Woo Sung Moon; Korean J Pathol. 2008;42(4):208-214.

1,916 View
22 Download

Abstract PDF: BACKGROUND
Hepatocellular carcinoma (HCC) is the most common primary malignant tumor of the human liver. However, the molecular changes and mechanisms that regulate the development and progression of HCC remain unclear. Beta-catenin is known as a multi-functional protein that acts as a regulator of the cadherin-mediated cell-cell adhesion system and also in the Wingless/Wnt signal transduction pathway. The aim of this study was to investigate the expression of beta-catenin and its possible role in HCC.
METHODS
We investigated the expression of beta-catenin, Ki-67, TP53, alpha-smooth muscle actin and CD34 by performing immunohistochemical staining for 61 specimens of HCC and their adjacent non-tumorous tissue. We also examined the relationship between the nuclear expression of beta-catenin and the clinicopathologic parameters.
RESULTS
The altered expression of beta-catenin was not detected in the nontumorous liver tissue. The nuclear expression of beta-catenin was observed in approximately 16% (10/61) of the HCC specimens. Double immunohistochemical staining for beta-catenin and E-cadherin showed a close relationship between nuclear translocation of beta-catenin and the loss of the membranous E-cadherin expression. Significant correlation was found between the nuclear translocation of beta-catenin and the tumor size, tumor necrosis and the presence of microvessel invasion and intrahepatic metastasis (p<0.05).
CONCLUSIONS
This data indicates that nuclear translocation of beta-catenin could play a role in the growth and progression of HCC.

Actinomycosis of the Penile Shaft Coexisting with Fibrous Pseudotumor of the Testis.: Eun Jung Cha, Kyu Yun Jang, Ho Sung Park, Jong Kwan Park, Chang Seop Lee, Myoung Ja Chung, Woo Sung Moon, Dong Geun Lee, Myoung Jae Kang; Korean J Pathol. 2008;42(1):50-53.

1,812 View
16 Download

Abstract PDF: Here, we present an uncommon case of the penile shaft actinomycosis with coexisting fibrous pseudotumors of the testis. A 37-year-old, circumcised man presented with one penile and eight scrotal masses. The penile mass having a healed surface ulceration was located at the right side of the penile shaft. It was relatively circumscribed without a fibrous capsule. The cut surface showed a yellow-brown color with central focal necrosis. The scrotal tumors were circumscribed, whorled, white masses 0.3-2.0 cm in diameters, and were attached to the tunica vaginalis and tunica albuginea. Microscopically, the penile mass showed active inflammatory changes containing actinomyces displaying characteristic sulfur granules. Testicular masses were fibrous pseudotumors composed of bland spindle and stellate cells lying in dense collagenous stroma. Actinomycosis of the penis has been reported to occur at the corona of the uncircumcised penis associated with pilonidal sinus. The present case was not associated with pilonidal sinus and, unusually, displayed co-existence with fibrous pseudotumors of the testis.

Pseudometastasis in Sentinel Lymph Nodes with Cytokeratin Debris-containing Histiocytes in Breast Cancer Patient: A Case Report.: Keum Ha Choi, Eun Jung Cha, Ha Na Choi, Woo Sung Moon; Korean J Pathol. 2007;41(6):427-429.

1,859 View
34 Download

Abstract PDF: Immunohistochemical staining for cytokeratins can detect false negative nodes in patients with breast carcinoma. We report on a patient with breast carcinoma and pseudometastasis detected by immunohistochemical staining within a negative sentinel lymph node. A 66-year-old woman underwent a simple mastectomy and sentinel lymph node biopsy. Immunohistochemical staining of the sentinel nodes for cytokeratin in permanent sections showed cells with intense cytoplasmic staining in the subcapsular sinus. The cells were negative for epithelial membrane antigen staining, but positive for CD68. In combination with morphologic findings and immunohistochemistry, cytokeratin-positive cells were confirmed as histiocytes with phagocytized cytokeratin debris. Careful correlation with histology and additional IHC could help avoid a misinterpretation of this type of pseudometastasis.

Synergistic Apoptotic Effect of Combination Treatment with Troglitazone and COX-2 Inhibitor in Glioma Cells.: Kyung Ryoul Kim, Min Young Park, Ho Sung Park, Kyu Yun Jang, Woo Sung Moon, Dong Geun Lee, Myoung Jae Kang; Korean J Pathol. 2007;41(1):1-6.

1,616 View
22 Download

Abstract PDF: BACKGROUND
The use of troglitazone (a PPARgamma ligand) and COX-2 inhibitor have been intensively studied for inhibition of tumor growth in cancer treatment, but the anti-tumor effect with a combination of these agents for cancer has not yet been studied. The aim of this study was to determine if low concentrations of troglitazone with COX-2 inhibitor in combination would cause significant cytotoxicity in glioma cells.
METHODS
The effects of co-treatment with troglitazone and COX-2 inhibitor on cell growth and apoptosis were assessed by use of trypan blue exclusion and a DNA fragmentation assay. A western blot was used to analyze the apoptotic signaling for the expression of bcl-2, bax, PARP and p21 proteins.
RESULTS
A low dose of troglitazone (5micrometer) and COX-2 inhibitor (5micrometer) strongly enhanced the cell growth inhibition and apoptosis in glioma cells when compared to a low dose of each drug alone. Western blotting analysis showed a decreased expression of bcl-2 and PARP proteins. In contrast, the bax protein level was increased.
CONCLUSIONS
The combination of troglitazone and COX-2 inhibitor in a low dose elicits synergistic cytotoxicity in glioma cells. Our study also demonstrates that down regulation of bcl-2, fragmentation of PARP protein and increased expression of bax protein were accompanied by co-treatment with troglitazone and the COX-2 inhibitor.

PPARgamma Ligand-Induced Decrease of in vivo Tumor Growth Accompanied by Increased Cytolytic Activity of Splenocytes.: Kyu Yun Jang, Ki Hoon Yu, Hak Yong Lee, Kyung Ryoul Kim, Ha Na Choi, Eun Jung Cha, Ho Sung Park, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2007;41(1):7-14.

1,519 View
19 Download

Abstract PDF: BACKGROUND
Recent studies have proposed the use of peroxisome proliferator activated receptor-gamma (PPARgamma) ligands as new chemotherapeutic agents for human malignant tumors. However the in vivo mechanism of PPARgamma ligands on cellular toxicity is not clear. Therefore we examined the anti-tumor effects of the PPARgamma ligand, rosiglitazone (ROS), in animal models.
METHODS
To evaluate the effect of RSO on splenocytes, an in vitro and in vivo study was performed. Cytolytic activity was measured by use of a 51Cr release assay. The splenic natural killer (NK) cell population and effector-target conjugation were measured by flow cytometric analysis.
RESULTS
In 9L glioma bearing rats, 30 mg/kg/d of ROS treatment induced a significant decrease of subcutaneous tumor growth accompanied by an increased cytolytic activity of splenocytes and of the splenic NKR-P1bright/CD3- NK cell population. In normal rats, systemic administration of ROS also increased the cytolytic activity of splenocytes, the splenic NK cell population, and effector-target conjugation. Moreover, we found that a concentration of 20micrometer ROS caused an increase in the cytolytic activity of splenocytes, and a concentration of 50micrometer ROS increased effector-target conjugation in vitro.
CONCLUSIONS
These results suggest that increased splenic cytolytic activity and NK cell population may contribute to the anti-tumor effects of PPARgamma ligands in vivo. However, the roles of NK cells in the PPARgamma ligand-induced anti-tumor activity should be further investigated.

Expression of Epidermal Growth Factor Receptor Related Protein in Gallbladder Cancer: An Association with p53 Mutation.: Ho Sung Park, Kyu Yun Jang, Kyung Ryoul Kim, Hak Yong Lee, Andrzej S Tarnawski, Adhip P N Majumdar, Myoung Jae Kang, Dong Geun Lee, Woo Sung Moon; Korean J Pathol. 2005;39(6):385-390.

1,800 View
16 Download

Abstract PDF: BACKGROUND
It has been well demonstrated that the overexpression of epidermal growth factor receptor (EGFR) is associated with numerous gastrointestinal malignancies, including gallbladder carcinoma. However, the cellular events that regulate EGFR in cancer cells have not been fully elucidated. A novel negative regulator of EGFR that is referred to as EGFR related protein (ERRP) has recently been identified. The aim of this study was to investigate the expression and localization of ERRP in gallbladder carcinoma and to examine a possible role for ERRP.
METHODS
We examined the immunohistochemical expressions of ERRP, p53 and proliferating cell nuclear antigen labeling index (PCNA-LI) in formalin-fixed, paraffinembedded specimens of 43 cases of gallbladder carcinoma, 7 cases of adenoma and 3 cases of dysplasia.
RESULTS
In the normal mucosa, ERRP immunoreactivity was positive in over 64% of specimens. In contrast, the ERRP staining was positive in only 46% of the cancer specimens. The expression of ERRP in cancer cells was inversely correlated with tumor cell proliferation. The loss of ERRP expression correlated with the p53 overexpression.
CONCLUSIONS
Our data indicate that the down-regulation or loss of ERRP could play an important role in the progression of gallbladder carcinoma. The inverse relationship between the ERRP expression and PCNA-LI suggests that ERRP may play a role in the inhibition of tumor cell proliferation in gallbladder cancer.

Expression of Vascular Endothelial Growth Factor-C in Breast Carcinoma.: Myoung Ja Chung, Sun Ho Yang, Kyu Yun Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2005;39(6):401-405.

1,515 View
12 Download

Abstract PDF: BACKGROUND
Vascular endothelial growth factor-C (VEGF-C) is a novel growth factor that regulates lymphangiogenesis and/or angiogenesis via binding to the vascular endothelial growth factor receptor-3 (VEGFR-3) or VEGFR-2. Recent studies have suggested that VEGF-C may play a role in lymph node metastasis. This study was conducted to examine whether the expression of VEGF-C is associated with the clinicopathologic parameters, and especially lymph node metastasis, of invasive ductal carcinoma.
METHODS
Immunohistochemical staining was performed for VEGF-C and CD31 in the surgically resected specimens from 83 patients with invasive breast carcinoma.
RESULTS
Of the 83 breast carcinomas, 61 (74%) cases showed cytoplasmic VEGF-C imunoreactivity. VEGF-C expression was associated with lymph node metastasis (p=0.03), but it did not correlate with tumor size, the histologic grade, and the presence of estrogen receptor or progesteron receptor. The mean microvessel density in the cases without VEGF-C expression was 51.9+/-30.1 and it was 72.9+/-33.0 in the cases with 2+ expression for VEGF-C (p=0.07).
CONCLUSIONS
This study suggests that VEGF-C expression may have an association with lymph node metastasis in the patients with breast carcinoma.

Thrombospondin-1 and -2 Expressions in Hepatocellular Carcinomas: an Association with Tumor Angiogenesis and p53 Overexpression.: Jae Sin Chung, Ho Sung Park, Hyun Jin Son, Myoung Jae Kang, Woo Sung Moon; Korean J Pathol. 2005;39(4):215-221.

1,718 View
19 Download

Abstract PDF: Background
: It has been suggested that thrombospondin (TSP) is a p53-dependent negative regulator of tumor angiogenesis. TSP expression and localization in hepatocellular carcinomas (HCCs) and its association with overexpression of p53 protein were investigated. Methods : TSP-1 and -2 expressions were examined in 40 HCC specimens by immunohistochemical staining and in 4 HCC cell lines by Western blotting. In addition, p53 protein expression and microvessel density (MVD) were correlated with the TSP expression. Results : Strong immu- nopositivity for TSP-1 was observed in fibroblasts, vascular endothelial cells, and some vas- cular smooth muscle cells of the stroma in 18 cases (45%), and in tumor cells in 3 cases (7.5%) of 40 cases of HCC. Immunoreactivity for TSP-2 was observed in only the sinusoidal lining cells of the tumor in 15 cases (46%), and in tumor cells in 2 cases (6%) of 32 cases of HCC. TSP-1 expression was inversely correlated with MVD (p=0.028), but TSP-2 expression did not show any correlation with MVD. Although p53 was overexpressed in 17 cases, there was no significant correlation between TSP and p53 expressions. None of the HCC cell lines expressed TSP-1 or -2. Conclusions : These findings indicate that TSP-1 is mainly derived from nonparenchymal cells, and may decrease tumor angiogenesis in HCC.

Expression of Vascular Endothelial Growth Factors A,C and D in Gastric Adenocarcinoma.: Myoung Ja Chung, Jin Wook Lee, Ki Hoon Yu, Doo Hyun Yang, Kyu Yun Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2005;39(2):99-105.

1,575 View
12 Download

Abstract PDF: BACKGROUND
Vascular endothelial growth factor (VEGF)-C and VEGF-D are novel growth factors that regulate lymphatic vessel growth. This study was designed to examine whether the expression of three VEGF family members, VEGF-A, VEGF-C and VEGF-D are associated with the clinicopathologic parameters, especially with lymph node metastasis, in advanced gastric carcinomas.
METHODS
Immunohistochemical staining was performed for VEGF-A, VEGF-C, and VEGF-D in the surgically resected specimens from 102 patients with advanced gastric carcinoma. The mRNA expressions of the three VEGF family members were assessed in 16 cases of tumor tissues and their corresponding non-neoplastic tissues.
RESULTS
Of the 102 gastric carcinomas, 74 (73%), 82 (80%), and 34 (33%) cases showed cytoplasmic immunoreactivity for VEGF-A, VEGF-C and VEGF-D, respectively. Both VEGF-A and VEGF-C expressions were associated with lymphatic invasion and lymph node metastasis (p<0.05), but the VEGF-D expression was not associated with them (p>0.05). In the tumor tissue, VEGF-C mRNA expression was greater, while VEGF-D mRNA expression was lower than in the nonneoplatic tissue adjacent to the tumor.
CONCLUSIONS
VEGF-A and VEGF-C may play important roles for the lymphatic spread of gastric carcinoma. We suggest that neutralizing both VEGF-A and VEGF-C may be reguired to block lymph node metastasis.

Inflammatory Myofibroblastic Tumor of the Breast: A Case Report.: Myoung Ja Chung, So Yeong Oh, Kyu Yun Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2005;39(1):54-58.

1,610 View
20 Download

Abstract PDF: Inflammatory myofibroblastic tumor (IMT) is characterized by a clonal proliferation of myofibroblasic spindle cells, and this is accompanied by a lymphoplasmacytic infiltration. In the majority of cases, this disease has occurred in the lungs and only 9 cases of IMT in the breast have been previously reported. We report here on an IMT in a 25-year-old-female who presented with a palpable mass in the right breast. Histologically, it was characterized by plump spindle cells admixed with prominent inflammation, that was composed of lymphocytes and plasma cells. Immunohistochemically, the spindle cells were positive for vimentin and -smooth muscle actin.

Granulosa Cell Tumor of the Unilocular Cystic Type: A Case Report.: Kyu Yun Jang, Myoung Ja Chung, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2004;38(4):284-287.

1,865 View
51 Download

Abstract PDF: Unilocular cystic granulosa cell tumors (UCG) are extremely rare. Due to the relatively small mass of the tumor available for histologic examination, diagnosis of UCG is not easy. Here we present a case of UCG in a 54-year old female. A 12x10 cm unilocular cystic mass was identified in the right ovary. The tumor was thin-walled and consisted of a single large cavity with a smooth internal surface. In most areas there were no cells lining the cyst, however, in focal areas the unilocular cyst was lined by one or more layers of uniform granulosa cells, forming Call-Exner bodies. A diagnosis of UCG was made after multiple sections were examined. A careful histologic examination is required for the correct diagnosis of UCG.

Rarity of EGFR and c-ErbB-2 Overexpressions in Hepatocellular Carcinoma: An Immunohistochemical Study.: Woo Sung Moon, Hyun Jin Son, Ho Sung Park, Min Young Park; Korean J Pathol. 2004;38(4):244-248.

1,816 View
13 Download

Abstract PDF: BACKGROUND
The overexpression of epidermal growth factor receptor (EGFR) and c-erbB-2 oncogenes has been implicated in the development of many types of cancer. However, the role of EGFR and c-erbB-2 overexpression in hepatocellular carcinoma (HCC) has not been fully elucidated.
METHODS
The aim of this study was to evaluate the immunohistochemical expression of EGFR and c-erbB-2 oncoprotein in a series of 52 HCCs.
RESULTS
All but one of the HCC tumor tissues were negative for EGFR monoclonal antibody, clone H11. All of the HCC tumor tissue samples were negative for EGFR monoclonal antibody, clone 29.1.1. However, strong EGFR immunoreactivity was detected in sinusoidal endothelial cells of HCC in 25 tumors (48%) using EGFR 29.1.1 antibody. The expression of c-erbB-2 was observed in 6% (3/52) of the HCCs. No significant correlation was found between p53 mutation and the expression of c-erbB-2.
CONCLUSION
Our results suggest that both EGFR and c-erbB-2 oncoprotein overexpressions in tumor cells are rare and do not seem to predominantly contribute to the malignant phenotype in HCC.

Intraocular Ossification: A Case Report.: Ho Sung Park, Tae Shik Kong, Kyu Yun Jang, Myoung Ja Chung, Woo Sung Moon, Dong Geun Lee, Myoung Jae Kang; Korean J Pathol. 2004;38(3):188-190.

1,687 View
23 Download

Abstract PDF: Heterotopic bone formation in the eyeball is a rare finding. Some etiologic factors, such as trauma, chronic inflammation, and long-standing retinal detachment have been associated with the onset of intraocular ossification. We report here on a case of a 21-year-old woman with a history of blunt trauma fifteen years ago, who complained of right eye blindness. When the right eyeball eviceration was done, a hard, grayish mass was found. On histopathologic examination, the mass showed lamellar bone with fatty marrow and hyalinized tissue with dystrophic calcification. We diagnosed her case as intraocular ossification.

Lymph Node Infarction After Fine-Needle Aspiration.: Ho Sung Park, Kyu Yun Jang, Myoung Ja Chung, Woo Sung Moon, Dong Geun Lee, Myoung Jae Kang; Korean J Pathol. 2004;38(3):204-207.

1,688 View
18 Download

Abstract PDF: Histologic alterations of lymph nodes following fine-needle aspiration have not been well described. Only two cases of lymph node infarction following fine-needle aspiration have currently been reported. We report here on a case of near total infarction of a lymph node that was detected 16 days after fine-needle aspiration in a 74-year old man. A fine-needle aspiration smear of the right inguinal lymph node showed scattered and clustered cells including lymphocytes, plasma cells, neutrophils that were seen as a reactive nodal hyperplasia in the clean background. There were no malignant cells, granulomas or necrotic debris. In the incisional biopsy of the same lymph node, the sections revealed a thin rim of viable lymphocytes, granular tissue was noted peripherally and extensive necrosis associated with vascular thrombi was noted centrally. There was no evidence of malignancy or granulomatous inflammation.

Abdominal Endometriosis Diagnosed by Fine Needle Aspiration Cytology: A Report of Two Cases.: Myoung Ja Chung, Yeon Jun Jeong, Ho Myong Hwang, Kyu Yoon Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Cytopathol. 2004;15(1):70-73.

1,438 View
11 Download

Abstract PDF: The incidence of endometriosis in post-operative abdominal scars is rare. We describe two cases of abdominal endometriosis diagnosed by fine needle aspiration (FNA). Both patients presented with subcutaneous masses at previous cesarean section scars with cyclic symptoms of pain. The cytologic smears were cellular and comprised two distinct cell populations consisting of epithelial and stromal components. An epithelial component consisted of flat sheets of polygonal cells and the second stromal component showed crowded clusters of spindle cells or isolated single cells. Hemosiderin-laden macrophages were found in the background. FNA offers a safe and effective tool for diagnosis of abdominal wall endometriosis.

Prevalence and Clinicopathologic Features of Mucinous Cystic Tumor and Intraductal Papillary Mucinous Tumor of Pancreas in Korea.: Jin Hee Sohn, Kyung Me Kim, Seoung Wan Chae, Woo Ho Kim, Woo Sung Moon, Young Nyun Park, Chul Gun Park, Eun sil Yu, Hee Kyung Jang, Hee Jin Jang, Jong Jae Jung, Jin Sook Jung, So Young Jin, Jong Sang Choi, Dae Young Kang; Korean J Pathol. 2003;37(4):270-278.

1,645 View
14 Download

Abstract PDF: BACKGROUND
Mucin producing cystic neoplasms, such as mucinous cystic tumor (MCT) and intraductal papillary mucinous tumor (IPMT) of the pancreas, are uncommon but become increasing in their incidences. The pathologic classification and biologic potential of these neoplasmsremain the subject of controversy.
METHODS
The Gastrointestinal Pathology Study Group of the Korean Society of Pathologists analyzed the clinicopathologic characteristics of 85 casesof MCT and 72 cases of IPMT and examined the expression patterns of p53, CEA and MUC1.
RESULTS
IPMT was located largely in the head, and showed connection with the main pancreatic duct (MPD, 68.1%), no ovarian-like stroma (0/72), and presence of intervening intratumoralnormal or atrophic parenchyma. On the other hand, MCT was located largely in thetail (73%), and showed common ovarian-like stroma (66/80), rare connection with the MPD(7/85) and no intervening pancreatic parenchyma. CEA and p53 immunoexpressions weresignificantly increased from adenoma through borderline to carcinoma, but MUC 1 was expressedonly in the invasive carcinoma among cases of MCT and IPMT.
CONCLUSIONS
The tumorlocation, ovarian-like stroma, connection with the MPD and intratumoral intervening nonneoplastictissue were helpful in the differential diagnosis between IPMT and MCT. CEA and p53expressions can be indicators of malignancy, while MUC 1 expression can indicate invasion.

Mucinous Adenocarcinoma of the Prostate: A Case Report.: Hyun Jin Son, Jae Sin Jeong, Woo Sung Moon, Myoung Jae Kang; Korean J Pathol. 2003;37(3):221-223.

1,608 View
17 Download

Abstract PDF: The diagnosis of mucinous adenocarcinoma of the prostate (MAP) requires that at least 25% of the tumor consists of pools of extracellular mucin. According to the above criteria, MAP is rare and about 70 cases have been reported in literature. Here we report a case of MAP arising in a 70-year-old man. In the present case, the proportion of the mucinous component was up to 95% of the total tumor volume, and Gleason's score is 8 (4+4). The tumor cells were prostatic specific antigen (PSA)-immunoreactive in mucinous and nonmucinous components. Despite the mucin pools, the tumor cells themselves failed to stain with any of the mucin stains.

The Expression of Transforming Growth Factor-1 and Its Signaling Receptors in Human Colorectal Carcinoma.: Gyeong Seon Kim, Joo Heon Kim, Woo Sung Moon, Myoung Ja Chung, Dong Geun Lee, Myoung Jae Kang; Korean J Pathol. 2001;35(2):115-122.

1,639 View
13 Download

Abstract PDF: BACKGROUND
Resistance to the potent growth inhibitory effects of TGF- (transforming growth factor-) is a characteristic of many malignancies. TGF- insensitivity has been attributed to alterations in the number and function of the TGF- receptors as well as disturbances of downstream signal transduction. The aim of this study was to examine the expression of TGF-1 and its receptors in human colorectal cancer tissue and determine its relationship with cancer growth and with prognostic factors.
METHODS
Immunohistochemical staining of TGF-1, TGF-RI, and TGF-RII was performed on 20 human colorectal adenomas, 30 carcinomas and 10 normal mucosas as a control.
RESULTS
The staining indices of TGF-1, TGF-RI, and TGF-RII increased in adenomas and carcinomas compared with normal mucosas and adenomas, respectively. In adenomas the staining index of TGF-1 significantly increased with the severity of atypism. The staining index of TGF-RII increased in the carcinomas in the right colon and rectum, compared with those in the left colon.
CONCLUSION
The enhanced expression of TGF-1, TGF-RI and II in the colorectal carcinoma suggests an important role of colorectal carcinogenesis and tumor progression.

Does the Colorectal Cancer Among Koreans Share the Same Pathological Features by Geographical Distribution: A Nationwide Survey of Surgically Resected 1,676 Cancers from 1,602 Patients.: Mee Soo Chang, Jin Hee Sohn, Dae Young Kang, Gyeong Hoon Kang, Myung Sook Kim, Woo Ho Kim, Jong Hee Nam, Woo Sung Moon, Sun Hoo Park, Cheol Jeun Park, Ro hyun Sung, Young Lyun Oh, Eun Sook Chang, Hee Kyung Chang, Mee Yon Cho, Kyung Ja Cho, Yong Il Kim; Korean J Pathol. 2001;35(1):14-19.

1,669 View
14 Download

Abstract PDF: BACKGROUND
This nationwide survey was undertaken to characterize the general pathological features of colorectal cancer in Korea, and especially to elucidate the geographical characteristics by means of their anatomical distribution.
METHODS
We analysed 1,676 colorectal cancers (from 1,602 patients) surgically resected in 1998 at 15 institutions from nine geographical sites in Korea.
RESULTS
The topographic incidence of colorectal cancer in seven out of the total nine geographical sites, was the highest in the rectum (32-54%); and those from Wonju and Cheongju were in the sigmoid colon (28% for both). The right colon cancer incidence was 42% in Wonju and 36% in Cheongju, while it was 17-22% in the other areas. The cecal cancer incidences in Wonju and in Taegu were 7% and 8%, respectively, but 0-4% in the other areas. As for histology, moderately differentiated adenocarcinoma was the most frequent (46-84%), except for in Wonju and Chonju, where the most predominant type was well differentiated (63% and 52%, respectively).
CONCLUSION
The incidence of right colon cancer was higher in Wonju and Cheongju, than in the other geographical sites. The cecal predilection was prominent in Taegu and Wonju. The Elucidation of geographical differences in degree of differentiation for tubular adenocarcinoma seems to require further cumulative study with strict guidelines.

Gastric Collision Tumor (Adenocarcinoma and Neuro-endocrine Carcinoma): A Report of Two Cases.: Ho Sung Park, Ja Myoung Chung, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2001;35(1):76-79.

1,503 View
15 Download

Abstract PDF: Concurrence of adenocarcinoma and neuroendocrine carcinoma in the gastrointestinal tract has rarely been observed. We report two cases of gastric collision tumors (adenocarcinoma and neuroendocrine carcinoma) that developed in a 64-year-old man and a 71-year-old man. In both cases, there was a single ulcerative lesion in the stomach. Histologically, the gastric lesions were composed of two discrete lesions: tubular adenocarcinoma at the edge of an ulcer and neuroendocrine carcinoma in the ulcer base. We will discuss collision and composite tumors.

Adenoid Basal Cell Tumor of the Prostate: A case report.: Joo Heon Kim, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee, Jae Y Ro; Korean J Pathol. 2000;34(7):534-536.

1,583 View
15 Download

Abstract PDF: Adenoid basal cell tumor of the prostate is a rare tumorous lesion that can be misdiagnosed as adenocarcinoma of the prostate. The malignant potential of adenoid basal cell tumor remains uncertain due to small number of reported cases. This 66-year-old man presented with symptoms of urinary tract obstruction. Under the impression of benign prostatic hyperplasia, a transurethral resection of the prostate (TURP) was performed. The patient was alive with no evidence of recurrence or metastasis 15 months after TURP. Microscopically, most of the lesions were composed of nodular collections of small nests of basaloid cells with peripheral palisading, and clusters of tumor cells forming cribriform pattern. Multiple areas of basal cell hyperplasia and atypical basal cell hyperpalsia were also observed. The coexistence of basal cell hyperplasia, atypical basal cell hyperpalsia, and adenoid basal cell tumor with cribriform pattern in this case supports a morphologic continuum from the benign hyperplastic lesion to malignant neoplasia.

Hyalinizing Trabecular Carcinoma of the Thyroid Gland: A report of two cases.: Kyu Yun Jang, Joo Heon Kim, Myoung Ja Chung, Woo Sung Moon, Myoung Jae Kang; Korean J Pathol. 2000;34(4):318-322.

1,520 View
12 Download

Abstract PDF: We report two cases of hyalinizing trabecular carcinoma (HTC) of the thyroid gland. These two patients were euthyroid women aged 36 and 65 years of age. The tumors were encapsulated and measured 0.8 and 4.0 cm in diameter, respectively. Histologically, the tumors were composed of a compact proliferation of cells in a lobular and trabecular pattern with an intervening hyalinized, fibrotic vascular stroma. Occasionally the cells were arrayed in microfollicles. Multiple and serial sections showed cords of tumor cells invading into the capsule in both cases and vascular invasion in one case. These findings suggested that HTCs are a malignant counterpart of hyalinizing trabecular adenoma, similar to conventional follicular tumor. Positive immunostaining of tumor cells for thyroglobulin and negative staining for high molecular weight cytokeratin, cytokeratin 19, neuron specific enolase, chromogranin, and synaptophysin allowed distinction from medullary carcinoma. Even though HTCs are an heterogeneous group of tumors, the present two cases are probably variants of follicular carcinoma rather than papillary carcinoma.

Fine Needle Aspiration Cytology of Inflammatory Myofibroblastic Tumor in Mesentery: A Case Report.: Hyun Jin Son, Joo Heon Kim, Woo Sung Moon, Myoung Jae Kang, Ho Yeul Choi; Korean J Cytopathol. 2000;11(1):35-40.

1,594 View
13 Download

Abstract PDF: Since inflammatory myofibroblastic tumor was initially recognized in the lung, this tumor has been described in other extrapulmonary sites. In spite of relatively uniform histologic findings in various organs, a rarity in extrapulmonary sites and highly vascular characteristics frequently lead to a misdiagnosis in preoperative radiology and fine needle aspiration cytology. We present a case of inflammatory myofibro blastic tumor occurring in the mesentery of a 4-month-old girl. Fine needle aspira tion cytology smear disclosed characteristic spindle cells intermixed with prominent mature plasma cells and lymphocytes. According to the immunohistochemical staining, we recognized that the intervening spindle cells are myofibroblasts which have reactivity for the both actin and vimentin.

Expression of Epidermal Growth Factor Related Peptides, EGF-R, and c-erbB-2 and Their Relationship with the Prognostic Factors in Gastric Carcinoma.: Joo Heon Kim, Jin Wook Lee, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 1999;33(11):1039-1046.

1,402 View
10 Download

Abstract PDF: Recent investigations have revealed that autocrine growth factors and their receptors are closely related and play an important role in controlling cancer cell growth. We performed an immunohistochemical study on the expression of epidermal growth factor (EGF), transforming growth factor-alpha (TGF-alpha), epidermal growth factor receptor (EGF-R), c-erbB-2, and PCNA labelling index in 60 cases of human gastric carcinomas. TGF-alpha was detected in 38 cases (63.3%), EGF in 26 cases (43.3%), EGF-R in 44 cases (73.3%), and c-erbB-2 in 18 cases (30%). These growth factors, EGF-R and c-erbB-2, were found more often in advanced gastric cancers. The PCNA labeling index was significantly higher in tumors with the expression of EGF-R or c-erbB-2. Tumors with simultaneous expression of EGF, TGF-alpha, EGF-R and c-erbB-2 was associated with a high PCNA labeling index. A correlation was observed between the synchronous expression of growth factors and its receptors and histological differentiation. The results suggest that the expression of EGF, TGF-alpha, EGF-R and c-erbB-2 are closely related and plays an important role in the growth and progression of human gastric carcinoma.

Polyvesicular Vitelline Tumor of the Ovary: A case report .: Woo Sung Moon, Dong Geun Lee; Korean J Pathol. 1999;33(11):1102-1106.

1,494 View
24 Download

Abstract PDF: Polyvesicular vitelline tumor of the ovary is an extremely rare variant of yolk sac tumor. We present a case of pure polyvesicular vitelline tumor in a 43-year-old woman. Light microscopy revealed a predominantly polyvesicular pattern embedded in mesoblastic stroma with the cysts showing two type of lining; tall columnar and cuboidal, or mesothelioid cells. The lining atypical cells showed occasional mitoses and intracytoplasmic PAS positive hyaline globules. In some areas, the cystic space contained a large amount of intraluminal hyaline material. Immunohistochemically, alpha- fetoprotein and alpha-1-antitrypsin were detected as a fine granular deposit in the cytoplasm of epithelial cells and hyaline globules. Electron microscopically, marked specialization of the vesicular lining cells suggested a differentiation toward gut structures and mature yolk sac.

Relationship between HPV Infection and bcl-2 Protein Expression and Apoptosis in Invasive and In Situ Squamous Cell Carcinoma of the Uterine Cervix.: Myoung Ja Chung, Kyu Yun Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 1999;33(9):702-708.

1,719 View
17 Download

Abstract PDF: Human papillomavirus (HPV) 16/18 is a causative agent of uterine cervical carcinoma. HPV 16/18 can alter cell cycle regulation through apoptosis. Bcl-2 is an important regulatory gene of apoptosis. A study was done to evaluate the relation between HPV 16/18 and bcl-2 and apoptosis in 21 cases of carcinoma in-situ (CIS), 5 cases of microinvasive carcinoma and 23 cases of invasive squamous cell carcinoma. HPV 16/18 was detected by hybrid capture system (HCS), bcl-2 protein by immunohistochemical method and apoptosis by using the hematoxylin-eosin stained slide. The results were as follows: Expression of the bcl-2 protein was 43% (9/21) in CIS and 26% (6/23) in invasive carcinoma. Expression of the bcl-2 protein was 42% (5/12) in CIS with HPV 16/18 infection, 44% in CIS without HPV 16/18 infection, 20% (2/10) in invasive carcinoma with HPV 16/18 infection and 31% (4/13) in invasive carcinoma without HPV 16/18 infection. Mean apoptotic index (mAI) was 3.36 in CIS, 5.23 in microinvasive and 6.25 in invasive carcinoma. mAI was 3.66 in CIS with HPV 16/18 infection, 2.86 in CIS without HPV 16/18 infection, 6.18 in invasive carcinoma with HPV 16/18 infection and 6.30 in invasive carcinoma without HPV 16/18 infection. Based on these results, we conclude that there are no correlation between HPV infection and bcl-2, and between HPV infection and apoptosis in invasive and in situ carcinoma of the uterine cervix, and apoptosis is increased according to tumor progression.

Ovarian Mucinous Cystadenocarcinoma with Mural Nodules of Anaplastic Carcinoma: A case report.: Kyu Yun Jang, Woo Sung Moon, Dong Geun Lee; Korean J Pathol. 1999;33(3):217-220.

1,907 View
35 Download

Abstract PDF: A case of an ovarian mucinous cystadenocarcinoma with mural nodules of anaplastic carcinoma is reported. The patient was a 46-year-old female with a right ovarian cystic mass and underwent a total abdominal hysterectomy with bilateral salpingo-oophorectomy. The patient died of the disease in five months. Macroscopically, the right ovarian cyst wall contained numerous well-demarcated mural nodules. Histologically, the cysts were mucinous cystadenocarcinoma, and the nodules were composed of sarcoma-like spindle and polygonal cells with atypia and numerous mitoses. Spindle cells in the mural nodule showed epithelial characteristics by electron microscopy and immunohistochemistry. This case supports an epithelial origin of the mural nodule of anaplastic carcinoma in ovarian mucinous tumors.

Carcinosarcoma in Recurrent Lesion of Serous Cystadenocarcinoma of the Ovary: A case report.: Kyu Yun Jang, Woo Sung Moon, Dong Geun Lee; Korean J Pathol. 1999;33(3):221-224.

1,480 View
10 Download

Abstract PDF: Neoplasms showing both carcinomatous and sarcomatous features are well established, and have been reported in practically every organ where carcinoma can occur. But the difference in terminology and difficulties in histopathologic interpretation have hampered adequate understanding of these neoplasms. We report a case of carcinosarcoma in the recurrent form of serous cystadenocarcinoma of the ovary. The patient was a 64-year-old female who underwent total hysterectomy and bilateral salpingoophorectomy three years ago, due to perforated papillary serous cysta denocarcinoma of the right ovary. Recurrent pelvic masses contained both carcinomatous and sarcomatous components. Morphological transition between carcinomatous and sarcomatous components, and epithelial characteristics in the sarcomatous component by immunohistochemistry were recognized. We postulate the histopathogenetic mechanism based on the phenotypic conversion of carcinoma into sarcoma in the carcinosarcoma.

Fine Needle Aspiration Cytology of Peripheral T Cell Lymphoma, Lymphoepithelioid Cell Type: Report of A Case Mimicking Tuberculous Lymphadenitis .: Ho Sung Park, Jong Myung Hong, Myoung Ja Chung, Woo Sung Moon; Korean J Cytopathol. 1999;10(2):185-189.

1,364 View
11 Download

Abstract PDF: The diagnosis of peripheral T cell lymphoma is difficult due to the varying size and shape of the neoplastic lymphoid cells and the frequent admixture of nonneoplastic mature lymphyocytes, histiocytes, eosinophils, and plasma cells. We report a case of peripheral T cell lymphoma, lymphoepithelioid cell type, which was difficult to differentiate from tuberculous lymphadenitis due to the aggregates of epithelioid histiocytes mimicking granuloma and the past history of pulmonary tuberculosis. Fine needle aspiration cytology of the inguinal lymph node in a 63-year-old male was characterized by hypercellular aspirates composed of a mixture of small and intermediate-size lymphoid cells and large lymphoid cells with background of confluent epithelioid histiocytes. The neoplastic lymphocytes demonstrated significant nuclear irregularity with protrusion and indentations of the nuclear membrane, prominent nucleoli, and frequent mitotic figures. The diagnosis of peripheral T cell lymphoma was confirmed by histological and immunohistochemical studies.

Adreno-Hepatic Fusion.: So Yeong Oh, Woo Sung Moon, Ho Yeul Choi; Korean J Pathol. 1998;32(12):1095-1097.

1,613 View
10 Download

Abstract: We report a rare case of adreno-hepatic fusion in a 63-year-old man with a traumatic hepatic rupture. The adrenal tissue was located beneath the Glisson's capsule of the liver, and measured 3.5x2x0.3 cm. On histologic examination, the ectopic tissue was composed of both adrenal cortex and medulla surrounded by a delicate capsule of connective tissue.

Fine Needle Aspiration Cytology of Lipoblastoma: A Report of Two Cases.: So Yeong Oh, Myoung Ja Chung, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Cytopathol. 1998;9(2):241-244.

1,468 View
13 Download

Abstract PDF: Lipoblastoma is a rare benign neoplasm occurring exclusively in children below the age of three years. It affects chiefly the upper and lower extremities, and less commonly head and neck area, trunk, mediastinum, mesentery, and retroperito neum. We present two cases of lipoblastoma occurring in the mediastinum of a 21-month-old boy and in the back of a 15-month-old boy. The characteristic features of Fine needle aspiration cytology smears were the presence of immature fat cells in the form of spindle-shaped cells, stellate cells and vacuolated lipoblasts along with lipocytes against a myxomatous background. Two tumors were histologically confirmed to be lipoblastomas. Lipoblastoma can be cytologically diagnosed by considering the cytologic findings and the age of the patient.

A Study of the Correlation between Prognostic Factors of Human Gastric Carcinomas and the Expression of CD44.: Ho Lee, Hyung Chul Kim, Woo Sung Moon, Myoung Jae Kang; Korean J Pathol. 1997;31(9):873-883.

1,463 View
10 Download

Abstract PDF: This study was performed to investigate the relationship between CD44 expression and depth of, tumor invasion histopathologic differentiation, tumor size, lymph node metastasis, and proliferating capacity of tumor cells in the gastric carcinoma. In 20 cases of early gastric carcinoma (EGC) and 40 cases of advanced gastric carcinoma (AGC), the immunohistochemical staining for CD44v3, CD44v5, and PCNA gave the following results. 1) In all 60 cases, the positive rates for CD44v3 and CD44v5 were 18.3% and 71.7%, respectively. 2) CD44v5 was expressed in 45% of EGC and 85% of AGC. 3) Larger tumors exhibited higher positive rates for CD44v5. 4) There were 28 cases of lymph node metastases out of 43 cases of CD44v5- positive primary gastric carcinomas (65.1%), and there were 4 cases of lymph node metastases out of 17 CD44v5-negative cases (23.5%). 5) There was no relationship between CD44v5 expression and PCNA index. Because the tumors that exhibit deep invasion, and large in size and have lymph node metastses tend to have more frequent expression of CD44v5, CD44v5 may be one of the useful prognostic markers for gastric carcinoma.

Fine Needle Aspiration Cytologic Findings of Metastatic Sex Cord Tumor with Annular Tubules to the Neck.: So Yeong Oh, Myoung Jae Kang, Myoung Ja Chung, Woo Sung Moon, Dong Geun Lee; Korean J Cytopathol. 1997;8(2):185-189.

1,342 View
10 Download

Abstract PDF: A sex cord tumor with annnular tubules is a relatively rare ovarian neoplasm. The cytologic findings from a fine needle aspiration biopsy of neck metastasis of a sex cord tumor with annnular tubules are described. The origin of the neck metastasis was the right ovary, and the tumor was diagnosed six years ago. The cytologic findings were characterized by tumor cells arranged in solid or follicular patterns. The tumor cells formed rosette-like or complex tubular structures with central rounded or coalesced hyaline materials. It was difficult to distinguish this tumor cytologically from granulosa cell tumor, thyroid follicular neoplasm, Sertoli-Leydig cell tumor, and Brenner tumor, but complex tubular structures were helpful in discriminating between these tumors.

Lymphocytic Hypophysitis Presenting with Diabetes Insipidus in a Man: Report of a case.: Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee, Hyung Il Kim, Ho Yeul Choi, Sang Ho Kim; Korean J Pathol. 1996;30(6):528-532.

1,735 View
11 Download

Abstract PDF: Lymphocytic hypophysitis is an autoimmune disorder of the pituitary gland which usually occurs in a woman in the postpartum period. Diabetes insipidus is not a major clinical feature of this disorder. We report a case of a 22-year-old man with lymphocytic hypophysitis which presented with diabetes insipidus and also involved his cavernous sinus. This represents the seventh reported and the youngest case of a man with lymphocytic hypophysitis. A comparative study of all six male patients is also presented. We suggest diabetes insipidus should be added to the spectrum of clinical manifestations of this disorder.

Adrenal Pseudocyst as a Result of Longterm Intake of Steroid Hormone.: Woo Sung Moon, So Yeong Oh, Myoung Jae Kang, Dong Geun Lee, Ho Yeul Choi, Sang Ho Kim; Korean J Pathol. 1996;30(4):355-357.

1,537 View
10 Download

Abstract PDF: Adrenal pseudocysts are uncommon lesions which usually occur as a result of hemorrhage within the adrenal tissue. Adrenal hemorrhage is usually associated with severe stress, sepsis, pregnancy, syphilis, leukemia, or anticoagulant therapy but during steroid therapy, it is very rare. We report a case of adrenal pseudocyst that resulted from hemorrhage into the adrenal gland and is probably related to the exogenous administration of steroids. The patient was a 57-year-old woman who was treated with oradexon for 20 years for the treatment of a maculopapular lesion on her thigh as well as for arthritis. She underwent a right adrenalectomy due to the adrenal cystic mass. The wall of the cystic mass was composed of a thick layer of hyalinized fibrous tissue with remnants of adrenal cortical tissue on the outer aspect. The inner surface had no lining cells and the wall of the cyst contained many calcified plaques with hemosiderin pigment.

Immunohistochemical and Ultrastructural Studies on the Histogenesis of Thyroid Undifferentiated Carcinoma.: Myoung Ja Jeong, Woo Sung Moon, Young Hye Lee, Myoung Jae Kang, Ho Yeul Choi, Sang Ho Kim, Dong Geun Lee; Korean J Pathol. 1995;29(6):756-765.

1,507 View
14 Download

Abstract PDF: Histologic, immunohistochemical and ultrastructural studies were performed on 6 cases of undifferentiated thyroid carcinoma to study the histogenesis of the undifferentiated thyroid carcinoma, to determine the most useful markers for diagnosing these tumors and to investigate the nature of osteoclast-like giant cells rarely observed in these tumors. For the immuno-histochemical study, a panel of antibodies to epithelial (cocktailed keratin, low molecular weight keratin, CEA), mesenchymal(vimentin, desmin, actin, FVIIIRAg) endocrine(calcitonin, chromogranin), lymphocytic(LCA), histiocytic(alpha-l-ACT, alpha-1-AT, lysozyme, CD68), and Schwann cell(S-100 protein) markers were used. The following results were obtained; 1) Well differentiated carcinoma was associated with 2 cases of spindle cell type and 1 case of giant cell type of undifferentiated thyroid carcinoma and a transitional zone between the well differentiated and undifferentiated lesions was observed. 2) All of the examined cases expressed keratin, and 3 tumors expressed CEA. 3) All the mesenchymal markers, LCA, S-100 protein, calcitonin, and chromogranin were not expressed. Vimentin was coexpressed with keratin in 4 cases. 4) Osteoclast-like giant cells were observed in 1 case of spindle cell type. They expressed CD68 but not keratin. 5) Ultrastructural study revealed the desmosomes between the tumor cells and non-neoplastic, follicular, thyroid epithelial cells. The above results indicate that undifferentiated thyroid carcinoma originates from follicular epithelial cell, keratin is the most useful marker for diagnosis of this tumor, and the osteoclast-like giant cells are histiocytic in nature and reactive, rather than neoplastic.

Immunohistochemical Study on the Proliferative Activity of Human Thyroid Tumors.: Myoung Jae Kang, Young Jin Jeong, Woo Sung Moon, Myoung Ja Jeong, Joo Heon Kim, Dong Geun Lee, Ho Yeul Choi, Sang Ho Kim; Korean J Pathol. 1995;29(1):77-84.

1,716 View
13 Download

Abstract PDF: For the estimation of the proliferative activity, related to the biologic behaviour, malignant potential, and prognosis, of human thyroid tumors, PCNA(proliferating cell nuclear antigen) immunohistochemical staining was performed on paraffin-embedded sections of 9 normal thyroid tissues, 9 adenomatous goiters, 9 follicular adenomas, 4 Hurthle cell tumors, 12 papillary carcinomas, 4 follicular carcinomas, and 3 anaplastic carcinomas. The results were as follows: 1) The PCNA labeling indices in adenomatous goiter, follicular adenoma, and Hurthle cell tumor were 1.1, 1.5, and 2.4, respectively. They were significantly higher than the labeling index in normal thyroid. 2) The PCNA labeling indices in papillary carcinoma and follicular carcinoma were 3.5 and 4.4, respectively. They were significantly higher than the labeling indices in adenomatous goiter and follicular adenoma, but there was no significant difference between papillary and follicular carcinoma. 3) The PCNA labeling index in anaplastic carcinoma, 14.1, was significantly higher than those in benign and other malignant tumors. According to the results, the PCNA labeling index was well correlated with the malignant potential of a tumor. So the PCNA immunohistochemical staining is thought to be a useful method for the evaluation of the malignant potential and prognosis of a tumor.

Histological, Enzyme Histochemical, and Electron Microscopic studies of the Rat Kidney Following Administration of Folic Acid.: Myoung Jae Kang, Woo Sung Moon, Dong Geun Lee, Ho Yeul Choi, Sang Ho Kim, Kyu Hyuk Cho; Korean J Pathol. 1994;28(5):449-459.

1,619 View
19 Download

Abstract PDF: To investigate the morphologic evidence of acute renal failure by folate, histological, histochemical (PAS), enzyme histochemical (Na-K-ATPase, G6PD, and ALP), and ultrastructural studies were performed. The results are as follows: l) Oliguria was most severe 3 hours after folate and the urine volume was 24.8% that of the control group. 2) Histologically, dilatation of tubules, degeneration and focal necrosis of the cortical tubules, and PAS(+) droplets in the tubular lumen were noted. And also frequent mitoses, mild interstital connective tissue proliferation, and neutrophilic infiltrates were observed in the late stage. 3) On enzyme histochemical examination, the activities of Na-K-ATPase and ALP were decreased, but G6PD activity was increased in comparison with the control group. 4) The ultrastructural studies revealed cytoplasmic vacuoles, apical cytoplasmic blebbing, dense bodies, mildly swollen mitochondria, dilated endoplasmic reticulum, loss bf brush border of the proximal tubules, and loss of microvilli of the thin limb of Henle's loop. Later, marked attenuation or loss of infoldings of basal plasma membrane of the cortical tubules was recognized. According to above results, the cause of acute renal failure by late is thought to be the injuries of tubular epithelial cells including sodium pump secondary to tubular obstruction.

Eccrine spiradenoma: A report of two cases.: Woo Sung Moon, Dong Geun Lee, Myoung Ja Jeong, Myoung Jae Kang, Ho Yeul Choi, Sang Ho Kim; Korean J Pathol. 1993;27(4):402-406.

1,451 View
14 Download

Abstract PDF: Eccrine spiradenomas are clinically characterized by a solitary, tender mass and they are situated on the upper parts of the body, predominantly on the ventral aspect. We herein report two cases of eccrine spiradenoma in 35-year-old man and 53-year-old woman, which located on upper extremity and inguinal region. The masses are round, well circumscribed and measuring 0.7x0.5x0.5 cm, 5x4.5x3 cm in size, respectively. Histopathologically, the tumor consists of masses of two types of cells, intensely staining cells and pale staining cells, usually arranged in chains, cords and pseudoglands. Immunostainings for low molecular cytokeratin, high molecular cytokeratin, carcinoembryonic antigen, and S-100 protein show positivity in neoplastic cells. Electron microscopically, the tumor was composed of three types of cells, i. e. 1) round or ovoid tumor cells in shape with scanty cytoplasm and poorly developed intracytoplasmic orgenelles, 2) spindle shaped dark cells interconnected by desmosomes, 3) large epithelial cells with abundant cytoplasm and cytoplasmic intermediate filaments which formed glandular structures. The large epithelial cells joint each other by desmosomal attachments and luminal cells featured small numbers of microvilli, but either secretory granules nor ductal type granules were noticed.

Dedifferentiated Liposarcoma of the Retroperitoneum: A case report.: Woo Sung Moon, Myoung Ja Jeong, Dong Geun Lee, Ho Yeoul Choi, Sang Ho Kim; Korean J Pathol. 1993;27(3):296-298.

2,110 View
53 Download

Abstract PDF: We report a case of dedifferentiated liposarcoma of retroperitoneum as a recurrent form in a 41 year old male. The patient received a extirpation for retroperitoneal mass and diagnosed as myxoid liosarcoma 4 years ago. The patient experienced 3 recurrences over a period of 4 years and diagnosed as myxoid liposarcoma in the second, third recurrence also. Histologically, the mass was composed of several clearly distinct elements : well differentiated liposarcoma, myxoid liposarcoma, myxoid malignant fibrous histiocytoma, poorly differntiated sarcoma, and fibrosarcoma. Immunohistochemically, S-100 protein was expressed in the area of spindle cell sarcoma, well differentiated liposarcoma, and malignant fibrous histiocytoma but alpha-1-antichymotrypsin was only expressed in the area of myxoid malignant fibrous histiocytoma.

Meningeal Melanocytoma Associated with Ota's Nevus: Report of a case.: Woo Sung Moon, Joo Heon Kim, Dong Geun Lee, Ho Yeul Choi, Sang Ho Kim; Korean J Pathol. 1992;26(6):605-609.

1,747 View
18 Download

Abstract PDF: Primary meningeal melanocytoma of the central nervous system is extremely rare. We report a case of meningeal melanocytoma associated with Ota's nevus as a recurrent form in a 53-year old male. The meningeal melanocytoma was removed from right parietooccipital lobe 4 years ago and recurred in right parietal, occipital and left frontal lobes. Ultrastructurally, the tumor cells were characterized by the presence of numerous melanosomes and premelanosomes in their cytoplasm. Moreover, the tumor was lacking in histologic and ultrastructural features of pigmented meningioma, melanotic schwannoma and prolonged clinical course was different from primary meningeal melanoma or metastatic malignant melanoma.

Sex Cord Tumor with Annular Tubules Associated with Turner's Syndrome: Report of a case.: Woo Sung Moon, Soo Hun Kim, Dong Geun Lee, Sang Ho Kim, Sung Nam Cho, So Ja Jin; Korean J Pathol. 1992;26(5):517-523.

1,450 View
11 Download

Abstract PDF: An ovarian sex cord tumor with annular tubules(SCTAT) in an 18-year-old woman who had secondary amenorrhea but not Peutz-Jeghers syndrome was studied by light and electron microscopy. Her clinical features were consistent with those of Turner's syndrome, i.e, shortness of stature, webbing of the neck, scanty or absent axillary and pubic hairs, lower hair line with streak gonad. Chromosomal analysis revealed 45, X/46, XX karyotype. The patient has been well and disease free for a period of 2 years after surgical removal of tumor. Histologically, the tumor was composed of nests of cells arranged in simple and complex annular tubules with central acidophilic hyaline bodies. Ultrastructurally, the cells had deeply indented nuclei and the cells were joined by specialized intercellular junctions along their lateral adjacent borders. Central acidophilic hyaline body consisted of concentric lamellae of basal lamina, but Charcot-Boettcher filaments were not observed.

Author index