Journal of Pathology and Translational Medicine

Nam Hee Won

28 Articles

Effect of Selective Cyclooxygenase 2 Inhibitor in TCDD Pre-exposed Thyroid Papillary Carcinoma Cell Line.: Hae Sung Kim, Kwang Sung Ahn, Jeong Hyeon Lee, Yang Seok Chae, Nam Hee Won, Jong Sang Choi, Chul Hwan Kim; Korean J Pathol. 2011;45(1):1-8.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.1.1

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BACKGROUND
Cyclooxygenase 2 (COX-2) is related to carcinogenesis and progression of cancer. COX-2 has been detected in thyroid cancer. This suggests that COX-2 inhibitor may be useful to control the growth of thyroid cancer cells as well as the progression of thyroid cancer. Tetrachlorodibenzodioxin (TCDD), acting as an inflammatory cytokine, directly induces the expression of COX-2. We examine whether TCDD controls the effect of COX-2 inhibitor on thyroid cancer cells.
METHODS
The effects of TCDD and celecoxib on thyroid papillary carcinoma cell line (SNU790) were examined using cell proliferation and fluorescence-activated cell sorting analysis. Western blot analysis was performed to determine the expressed COX-2 levels and the cell cycle-related proteins. The matrix metalloproteinase-2 (MMP-2) expression and gelatinolytic activity were examined using real time-polymerase chain reaction and zymography.
RESULTS
TCDD directly induced the growth of SNU790 and the expression of cyclin D1, cyclin A, cyclin E, p21 and COX-2. Celecoxib suppressed the growth of SNU790 and the expression of cyclin D1 and cyclin E. Celecoxib reduced the MMP-2 expression and the gelatinolytic activity, but those effects were decreased in the SNU790 by either pre-treatment with TCDD or co-treatment with TCDD and celecoxib.
CONCLUSIONS
Celocoxib effect is directly reduced depending on the exposure to TCDD. TCDD exposure should be considered in the treatment with Celecoxib.

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Histone H3 phosphorylation, immediate-early gene expression, and the nucleosomal response: a historical perspective1This article is part of Special Issue entitled Asilomar Chromatin and has undergone the Journal’s usual peer review process.
Shannon Healy, Protiti Khan, Shihua He, James R. Davie
Biochemistry and Cell Biology.2012; 90(1): 39. CrossRef

Practical Standardization in Renal Biopsy Reporting.: So Young Jin, Hyeon Joo Jeong, Sun Hee Sung, Beom Jin Lim, Jee Young Han, Soon Won Hong, Hyun Ee Yim, Yeong Jin Choi, Yong Mee Cho, Myoung Jae Kang, Kyung Chul Moon, Hee Jeong Cha, Seung Yeon Ha, Mi Seon Kang, Mee Young So, Kwang Sun Suh, Jong Eun Joo, Yong Jin Kim, Nam Hee Won, Moon Hyang Park; Korean J Pathol. 2010;44(6):613-622.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.6.613

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Abstract PDF

BACKGROUND
To standardize renal biopsy reporting and diagnosis, The Renal Pathology Study Group of the Korean Society of Pathologists (RPSKSP) has developed a renal pathology reporting format for the native and allograft kidney.
METHODS
A consensus checklist of a provisional renal biopsy format was sent to all members of the RPSKSP. Feed back opinions regarding the practical application of the checklist to the diagnostic work were received.
RESULTS
Kidney biopsies require three essential examinations: by light microscopy, immunofluorescence (IF), and electron microscopy (EM). A final report of a renal biopsy should include information on specimen adequacy and a description of the morphologic change using a systematic semiquantitative method for each of the compartments, with optional separate IF and EM reports.
CONCLUSIONS
A standard renal biopsy report format is important in establishing clinicopathologic correlations, making reliable prognostic considerations, comparing the findings in sequential biopsies and evaluating the effects of therapy.

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Additional antihypertensive effect of magnesium supplementation with an angiotensin II receptor blocker in hypomagnesemic rats
Kyubok Jin, Tae Hee Kim, Yeong Hoon Kim, Yang Wook Kim
The Korean Journal of Internal Medicine.2013; 28(2): 197. CrossRef
Clinicopathologic Features of IgA-Dominant Postinfectious Glomerulonephritis
Tai Yeon Koo, Gheun-Ho Kim, Hyang Park
Korean Journal of Pathology.2012; 46(2): 105. CrossRef

Hepatoid Thymic Carcinoma: A Case Report.: Jeong Hyeon Lee, Hyunchul Kim, Yang Seok Chae, Nam Hee Won, Jong Sang Choi, Chul Hwan Kim; Korean J Pathol. 2009;43(6):562-565.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.6.562

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Abstract PDF

We report here on a rare case of hepatoid thymic carcinoma in a 34-year-old man. The patient complained of a high fever and headache, and a 6.6cm-sized anterior mediastinal mass was found on chest computed tomography (CT). There was no hepatic mass seen on abdominal CT. The resected mass consisted of epithelioid cells with abundant eosinophilic cytoplasm, pleomorphic vesicular nuclei and prominent nucleoli, and the mass was surrounded by thymic tissue. The tumor cells were immunopositive for cytokeratin 7, alpha-1-antitrypsin, hepatocyte staining, and epithelial membrane antigen, but they were negative for CD5, alpha-fetoprotein (AFP) and placental alkaline phosphatase, and this all led to a diagnosis of hepatoid thymic carcinoma rather than hepatoid yolk sac tumor. This entity should be included in the differential diagnosis of epithelioid thymic tumors.

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Hepatoid thymic carcinoma in a polycythemia vera patient treated with ropeginterferon Alfa-2b: Clinical, histopathological and molecular correlates
Giuseppe G. Loscocco, Margherita Vannucchi, Raffaella Santi, Andrea Amorosi, Stefania Scarpino, Maria Chiara Siciliano, Paola Guglielmelli, Claudio Tripodo, Arianna Di Napoli, Alessandro M. Vannucchi
Pathology - Research and Practice.2024; 263: 155648. CrossRef

Gliosarcoma with Components of Anaplastic Oligodendroglioma and Unclassifiable Spindle Cells: A Case Report.: Jung Woo Choi, Youngseok Lee, Jung Suk An, Nam Hee Won, Yong Gu Chung, Yang Seok Chae; Korean J Pathol. 2008;42(1):45-49.

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Abstract PDF: Gliosarcoma is a distinct disease entity that is characterized by a biphasic tissue pattern with alternating areas displaying glial and mesenchymal differentiation. The tumor in our case was a rare morphologic variant of gliosarcoma with components of anaplastic oligodendroglioma and unclassifiable spindle cells. Spindle cells showed CD34 and S-100 protein immunoreactivity, which was possibly related to peripheral nerve sheath differentiation. This unique feature has not been described previously and so this case expands the spectrum of possible divergent mesenchymal differentiation, and it lends support to pluripotential stem cells being the origin of this tumor.

Comparative Analysis of Serum Mannose-Binding Lectin in Normal Population and Patients with Different Types of Cancer.: Bum Joon Kim, Young Sik Kim, Eun Mee Han, Eung Seok Lee, Nam Hee Won, Geung Hwan Ahn, Dale Lee, Bom Woo Yeom; Korean J Pathol. 2004;38(5):306-310.

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Abstract PDF: BACKGROUND
Mannose-binding lectin (MBL) is a serum protein of innate immunity. Its genetic mutations lead to deficiency of serum MBL and recurrent pyogenic infection in childhood. However, little is known about the frequency of its gene mutations or serum levels in Korean population and patients with cancers.
METHODS
We studied the mutational genotypes of MBL exon 1 codon 52, 54, and 57 or serum MBL levels from 102 normal adults and 228 cases of breast, stomach, colon, uterine cervical, and lung cancers by allele-specific PCR and enzyme-linked immunosorbent assay.
RESULTS
MBL gene mutations were found in 32 of 102 normal adults (31.4%), and were restricted only to exon 1 codon 54 showing homozygous (n=5, 4.9%) or heterozygous mutations (n=27, 26.5%). Mean and median serum MBL in the patients with cancers were increased (2,647+/-1,742 and 2,915 ng/mL, mean+/-S.D. and median) than those of normal adults (1,906+/-1,359 and 1,758 ng/mL). Serum MBL level was significantly increased in the patients with stomach, uterine cervical, colon, and lung cancers.
CONCLUSION
Our results indicate that the frequency and pattern of MBL gene mutations and its serum level is very similar among northeastern Asian populations. In addition, MBL might be involved in an immunologic response against common cancers, although further studies are needed.

K-ras Gene Mutations and Expression of K-ras, p16, Cyclin D1 and p53 in Synchronous Lesions of The Colon Adenoma-Carcinoma Sequences.: Hwa Eun Oh, Seong Jin Cho, Nam Hee Won, Dale Lee, Insun Kim, Bom Woo Yeom; Korean J Pathol. 2001;35(4):291-298.

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Abstract PDF: BACKGROUND
The colorectal adenoma-carcinoma sequence represents a well-known para-digm for the sequential development of cancer driven by the accumulation of genomic defects. Although the colorectal adenoma-carcinoma sequence has been well investigated, the studies about tumors of different dignity co-existent in the same patient are rare. K-ras mutation is an early genetic change in colon cancer. The genes involved in the cell cycle such as cyclin D1, p16, and p53 are important in the tumorigenesis of the colon. The aims of this study were to determine K-ras gene mutation and expression of K-ras, p16, cyclin D1 and p53 in synchronous lesions of the colon adenoma-carcinoma sequences and their possible relationship with K-ras mutation.
METHODS
The materials included 45 colonic adenocarcinomas which were accompanied by adenoma (22 low grade and 26 high grade). By using polymerase chain reaction-single strand conformational polymorphism (PCR-SSCP), we detected K-ras mutation of codon 12. An aberrant K-ras, p16, cyclin D1 and p53 expressions were stained using an immunohistochemical method. RESULTS: K-ras mutation was 52.4% (11/21) of high grade adenomas. K-ras expression was 65.4% (17/26) of high grade adenomas. p16 and cyclin D1 expressions were 50% (11/22) and 90.9% (20/22) of low grade adenomas, respectively. p53 expression was 75.6% (34/45) of adenocarcinomas. There were statistical correlations among K-ras, p16 and cyclin D1.
CONCLUSIONS
These results indicate that the ras gene mutation is an early event and the overexpressions of p16, cyclin D1 and p53 are associated with K-ras mutation and expression in adenoma-carcinoma sequences.

Metastatic Germinoma of Spleen from Perichiasmal Area: A Case Report .: Bong Kyung Shin, Min Kyung Kim, Han Kyeom Kim, Yang Seok Chae, Nam Hee Won, Insun Kim; Korean J Cytopathol. 2001;12(1):61-65.

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Abstract PDF: A 20-year-old young man who had undergone treatment for a suprasellar/perichiasmal tumor 2 years before, was presented with a huge palpable splenic mass. A fine needle aspiration cytology from the splenic mass showed dissociated large pleomorphic tumor cells having irregular nuclear outline, coarse chromatin, and one or two macronucleoli, and scattered small lymphocytes in fine granular background. Above cytologic findings were regarded as the characteristics of germinoma. Differential diagnosis from the large cell lymphoma of spleen was emphasized.

E-Cadherin Expression in Renal Cell Carcinoma according to the Mainz Classification.: Ju Han Lee, Hyun Deuk Cho, Dale Lee, Nam Hee Won; Korean J Pathol. 1999;33(12):1131-1138.

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Abstract PDF: According to the Mainz classification, renal cell carcinoma (RCC) consists of three subtypes: each has characteristic genetic alterations within the chromosomal or mitochondrial DNA. The three subtypes are: clear cell type, chromophil type, and chromophobe type. E-cadherin is a Ca++-dependent adhesion molecule which plays a major role in the maintenance of intercellular adhesion in epithelial tissues. In a normal kidney, E-cadherin is expressed in the distal tubule and the collecting duct, but not in the proximal tubule. We reclassified 110 cases of RCC according to mainz classification. Immunohistochemical staining for E-cadherin was done on twenty eight cases of RCC, including 18 cases of clear cell type, four cases of chromophil type, and six cases of chromophobe type. The results were as follows: 1) of the 110 cases of RCC, 96 cases (87.3%) were of clear cell type, four cases (3.6%) of chromophil type, and ten cases (9.1%) of chromophobe type, 2) there was no significant correlation between the nuclear grade and clinical stage according to each subtype, 3) E-cadherin expression showed a strong positive reaction along the cell membranes in all six cases of chromophobe type. The differential expression of E-cadherin in RCC may suggest that the chromophobe type may have different biologic characteristics from other types of RCC.

Immunohistochemical Analysis of Transforming Growth Factor (TGF)-beta1 and TGF-beta Receptor II and Quantitative Analysis of TGF-beta1 mRNA during Multistep Hepatocarcinogenesis Induced by Diethylnitrosamine in Sprague-Dawley Rats.: Mee Yon Cho, Ju Han Lee, Yong Koo Kang, Nam Hee Won; Korean J Pathol. 1999;33(11):1009-1023.

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Abstract PDF: Transforming growth factor (TGF)-beta1 plays an important role in hepatocarcinogenesis and has been described as a useful tumor marker and one of the poor prognostic indicators in patients with hepatocellular carcinoma (HCC). To investigate the role and cellular localization of TGF-beta1 during multistep hepatocarcinogenesis we performed a quantitative analysis of TGF-beta1 mRNA and immunohistochemical expression of TGF-beta1 and TGF-beta receptor II (TGF-betarII) in female Sprague-Dawley rats. The experimental groups included neoplastic lesions produced by Solt-Farber's protocol, regenerating liver after partial hepatectomy, and normal control. Quantitative change of TGF-beta1 mRNA was analysed by competitive reverse-transcription polymerase chain reaction (RT-PCR). TGF-beta1 protein and TGF-betarII expression were evaluated by immunohistochemical stain. The discrete tumor nodules were detected on 14th day and then increased in number and size. Three HCCs were induced on 8th or 9th month. RT-PCR demonstrated TGF-beta1 mRNA band in all examples of the normal and regenerating liver, nodules and HCCs. Competitive RT-PCR displayed higher TGF-beta1 mRNA in nodules, HCCs and regenerating liver than in normal controls. Hepatocytes from control and regenerating livers showed weak immunoreactivity for TGF-beta1. In contrast, the cytoplasm of hepatocytes of nodules in 7th, 8th and 9th month and HCCs were intensely stained for TGF-beta1. Some sinusoidal cells showed immunoreactivity for TGF-beta1 in all experimental groups. In early phase of carcinogenesis, the cytoplasm of hepatocytes in liver of 12h, 1d and 3d showed transiently increased immunoreactivity for TGF-beta1 and The immunoreactivity decreased thereafter. TGF-beta1 mRNA was also detected in the neoplastic hepatocytes by in-situ hybridization. Although TGF-betarII expression was correlated with TGF-beta1 immunoreactivity during early phase of carcinogenesis, hepatocytes in most nodules in 7th, 8th, 9th month and carcinomas showed decreased or little immunoreactivity for TGF-betarII. Based on the above results, it is concluded that TGF-beta1 expression increases not only in precancerous nodules but also in HCCs and its increase seems to be correlated with decrease or loss of TGF-betarII expression although its mechanism remains unclear. Hepatocytes may be a major cellular source of TGF-beta1 during hepatocarcinogenesis.

Leiomyosarcoma of the Pancreas: A case report.: Bong Kyung Shin, Jung Suk Moon, Hwa Eun Oh, Nam Hee Won, Jong Sang Choi; Korean J Pathol. 1999;33(9):733-736.

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Abstract PDF: Most of the malignant tumors of the pancreas are adenocarcinomas arising from the ductal epithelium. Primary leiomyosarcoma of the pancreas, even though it is the most common sarcoma of the pancreas, is very rare. We present a case of leiomyosarcoma of the pancreas, probably primary, with metastases to the stomach, lymph nodes, and abdominal wall. A 52-year-old woman visited the hospital with vague right upper abdominal pain and weigh loss of 6 kg for 2 months. The radiological and endoscopic examination revealed that she had a large heterogeneous mass, 11 cm in size, in the pancreatic body and tail, a 4 cm-sized mass in the paraaortic area, and a 3 cm-sized polypoid mass in the stomach. Histologically, they were all similar to one another and composed of markedly pleomorphic cells. Immunohistochemical and electron microscopic studies showed definite smooth muscle differentiation of the tumor cells. Two months later, the patient underwent an excision of a new 3 cm mass in the right lower abdominal wall, showing features of well differentiated leiomyosarcoma.

Spontaneous Pneumothorax as a Complication of Pulmonary Metastasis of Osteosarcoma A case report.: Min Kyung Kim, Bong Kyung Shin, Wha Eun Oh, Ae Ree Kim, Nam Hee Won, Jong Sang Choi; Korean J Pathol. 1999;33(4):281-284.

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Abstract PDF: Spontaneous pneumothorax is a known, but relatively rare complication of pulmonary metastases of sarcoma. A 19-year-old man was presented with chest pain and dyspnea for three days and was diagnosed as left pneumothorax. After bleb resection, microscopic examination revealed metastatic osteosarcoma forming subpleural fistula and dystrophic calcification. Four years ago, he had had limb salvage operation and chemotherapy for osteosarcoma of left femur. After two and a half years he had a bleb resection for right pneumothorax without any evidence of metastasis. Six months later, he was found to have a 4x3cm sized lung mass in the right lower lobe. After lobectomy, he was diagnosed as pulmonary metastasis of osteosarcoma. Pneumothorax is the common complication of metastatic osteosarcoma to the lung and it may be presented before the pulmonary metastasis is clinically evident. It is important to recognize a pneumothorax of the patients with osteosarcoma as a possible sign of metastases.

Usefulness of E-Cadherin Expression in Malignant Effusion .: Sung Jig Lim, Gou Young Kim, Youn Wha Kim, Yong Koo Park, Juhie Lee, Moon Ho Yang, Nam Hee Won; Korean J Cytopathol. 1999;10(2):121-126.

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Abstract PDF: The usefulness of E-cadherin immunostaining as a marker of malignancy in the body fluids was investigated in the present study. Thirty-three histologically proven cases of cell blocks from the pleural, peritoneal, and pericardial fluids were studied by immunocytochemistry for E-cadherin antibody using LSAB method. These cases were cytologically diagnosed as adenocarcinoma (25 cases) and atypical cells (8 cases). Tumor cells showed strong positive membranous staining for E-cadherin antibody in 21 out of 25 cases (84%) of adenocarcinoma. E-cadherin staining was not found in 6 of 8 cases of suspicious maligancy. The sensitivity and specificity were 84% and 75%, respectively. Reactive mesothelial cells and inflammatory cells scattered were all negative. In conclusion, E-cadherin is an useful adjunctive marker to distinguish reactive mesothelial cells from the carcinoma cells in the body fluids.

p53 Mutation and Expression of Rb Protein in Germ Cell Tumors.: Ju Han Lee, Mee Yon Cho, Hae Hyeog Lee, Bom Woo Yeom, Nam Hee Won; Korean J Pathol. 1998;32(12):1074-1080.

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Abstract: We investigated the role of the tumor suppressor genes in the germ cell tumor. Immunohistochemistry (IHC) and polymerase chain reaction-single strand conformational polymorphism (PCR-SSCP) for p53 mutation were done in 46 cases of the germ cell tumor with paraffin embedded tissue. The immunohistochemical staining for Rb protein was also performed in the same specimens. The following results were obtained. The overexpression of the p53 protein was detected in 7 of 46 cases (15%). p53 mutation by PCR-SSCP was detected in 1 of 46 cases (2.2%). Expression of Rb protein was negative in 19 cases (41%). These results suggest that p53 mutation does not play an important role in the initiation and progression of germ cell tumors.

Fine Needle Aspiration Cytology of the Breast Lesions: Application of the Masood's Scoring System.: Ae Lee Kim, Hye Sun Kim, Han Kyeom Kim, Nam Hee Won, Mee Ja Park, Bum Hwan Koo; Korean J Cytopathol. 1998;9(1):45-54.

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Abstract PDF: Fine needle aspiration cytology is considered as a useful diagnostic procedure in management of patients with breast lesions. This study was undertaken to evaluate the scoring system of Masood in the interpretation of breast aspirates, to establish the most useful cytologic criteria for the diagnosis of breast lesions, and to subclassify the benign breast diseases. To assess the feasibility of a cytologic grading system, 57 cases of benign breast disease, 61 cases of malignant breast disease were studied, respectively. The aspirates were evaluated for the cellular arrangement, the degree of cellular pleomorphism and anisonucleosis, and the presence of myoepithelial cells and nuceoli. Values ranging from 1 to 4 were assigned to each criterion and the sum of the individual values was made for each case. The presence of stroma, apocrine metaplasia, foamy histiocytes and inflammatory cells, background of the smear, and cellularity were also evaluated. Cut-off value of the scoring system of Masood between benign and malignant lesion was 15. Among the cytologic criteria, cellular arrangement, presence of myoepithelial cells, nucleoli, and stroma, status of chromatin pattern, and background of smear were useful criteria in the differentiation between benign and malignant lesions. Application of the scoring system of Masood does not always make the accurate diagnosis and the subclassification of benign breast disease.

Inflammatory Pseudotumor of the Kidney.: Hwa Eun Oh, Jeong Seok Moon, Sung Jin Cho, Nam Hee Won; Korean J Pathol. 1997;31(6):592-594.

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Abstract PDF: Inflammatory pseudotumor, originally described in the lung, is a relatively rare tumor-like lesion that occurs in various organs and tissues. It is usually well demarcated from the surrounding tissue, however it can be unfortunately resected as a malignant tumor. A few inflammtory pseudotumor in the kidney have been reported in English literature, but there have been no reports in Korea. We report a case with inflammatory pseudotumor of the kidney. A 48 year old woman had an intermittent flank pain on the right side. An ultrasonographic study suggested a renal cell carcinoma and a nephrectomy was done. Grossly, there were two separate masses with a well demarcated yellowish appearance, measuring 2.3 cm and 1.3 cm in diameter, respectively. Histologically, they were composed of smooth muscle actin positive spindle cells and a large number of foamy histiocytes, lymphocytes, and plasma cells in the fibrotic backgound.

Expression of bcl-2 Protein in Colorectal Adenoma and Adenocarcinoma and its Relationship with p53 and Apoptosis.: Ae Ree Kim, Seong Jin Cho, Nam Hee Won, Yang Seok Chae; Korean J Pathol. 1997;31(5):417-426.

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Abstract PDF: Either increased cellular proliferation or decreased death might result in an expansion of their numbers in the oncogenic process. Cellular apoptosis represents an autonomous suicide pathway that helps to restrict the cell number. However bcl-2 and mutant p53 inhibit programmed cell death. To determine whether the bcl-2 gene is activated during colorectal tumorigenesis and whether it has any relationship with p53 and apoptosis, we studied the expression of bcl-2 and p53 in the normal colonic mucosa, in the adenomatous polyps and in the adenocarcinomas using the immunohistochemical method. Also we evaluated the status of apoptosis using the in situ end labeling method. The bcl-2 immunoreactivity was restricted to the basal epithelial cells of all normal colonic mucosa and they were expressed in all adenomas and 86% of adenocarcinomas, especially in the superficial lesion of some tumors. Mutations of p53 were not found in the normal colonic mucosa, but they were present in dysplastic cells of adenomas (52%) and in cancer cells of the adenocarcinomas (47%). Apoptosis was confined to the tips of the normal colonic mucosa. It was more easily detected in the p53-positive adenomas than in the p53-negative adenomas (p=0.010). In the adenocarcinomas, the findings of apoptotic process are not related with p53 mutation (p=0.3) and bcl-2 expression (p=0.187). p53 and bcl-2 are probably one step of several apoptotic processes in the adenocarcinomas.

The p53 Mutation and DNA Ploidy in Human Metastatic Breast Cancer.: Seong Jin Cho, Ae Ree Kim, Nam Hee Won; Korean J Pathol. 1997;31(2):135-144.

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Abstract PDF: The p53 gene, one of the tumor suppressor genes, is believed to play an important role through mutation and overexpression in the progression of various human malignant tumors. To compare the p53 mutation status between the primary and metastatic lesions of breast cancers and to investigate the mutational pattern of p53, immunohistochemistry (IHC) and polymerase chain reaction and single strand conformational polymorphism (PCR-SSCP) were performed in 25 cases of breast cancers with paraffin embedded tissue. Mutant protein products or point mutation were detected through IHC or PCR-SSCP method. And flow cytometrical (FCM) analysis were performed in the same paraffin blocks to correlate the DNA ploidy and p53 mutation. The following results are summarized. 1. The detection of the p53 gene mutation and overexpression of the p53 protein were measured in 40% and 48%, respectively, in 25 primary tumors, either or both methods was detected in 64%. 2. A concordance rate of the p53 protein expression between the primary and metastatic lesions of 25 breast cancers was 100%, but the concordance rate of the p53 gene mutation was 72%. 3. The correlation between the p53 mutation and the DNA aneuploidy was not statistically significant (p=0.38) 4. A p53 mutation by IHC or PCR-SSCP was more frequently detected in grade III breast cancers than in grade I or II. 5. Among 5 to 9 exons of the p53 gene, exon 7 was the most frequent mutation spot in this study. 6. Additional mutation of the p53 gene was developed in the three metastatic lesions. With the above results it is suggested that the p53 protein overexpression by immunohistochemistry is not correlated with the p53 mutation by PCR-SSCP. The p53 mutation pattern between the primary and metastatic lesions are not idenitical and an additional point mutation can occur in the metastatic lesion. The DNA aneuploidy is more frequently detected in the cases with the p53 protein overexpression than in the p53 protein negative, but it is not statistically significant.

Fine Needle Aspiration Cytology of Mucoepidermoid Carcinoma of the Salivary Gland.: Jeong Seok Moon, Hwa Eun Oh, Joo Han Lee, Aee Ree Kim, Chul Hwan Kim, Han Kyeom Kim, Mee Ja Park, Nam Hee Won; Korean J Cytopathol. 1997;8(2):135-142.

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Abstract PDF: PURPOSE: There is no specific treatment guidelines for Henoch-Schonlein (HS) nephritis. Therefore we performed this study to observe the effect of long term steroid therapy combined with azathioprine METHODS: Treatment protocols; 1) Steroid pulse therapy: methylprednisolon 30 mg/kg/dose, maximum 1 gm, intravenously 6 times for alternate day. 2) Oral steroid was given 2 mg/kg/day for 1 month, 1 mg/kg/day for following I month and alternate day oral steroid combined with azathioprine 2 mg/kg/day for 2 years. RESULTS: Time period from HSP to onset of HS nephritis was between 2 weeks to 5 months with mean 7.4+/-7.4 weeks. Clinical remission were seen in 4 cases out of 5 (80%). Mean time period with disappearance of proteinuria and microscopic hematuria were 5+/-2.4 month and 13.3+/-2.9 month respectively. On pathologic findings by ISKDC, 3 cases were grade IIIb, 2 cases were grade IV in first kidney biopsies and showed pathologic improvement in follow up kidney biopsies after 2 years treatment. CONCLUSION: As there no definitive treatment for HS nephritis so far, our study of long term oral steroid therapy with azathioprine was effective in clinical and histologic aspect. Therefore further study in HS nephritis with in a large group will be needed in the future.

Large-Cell Acanthoma: A case report.: Yu Hoon Kim, Seong Jin Cho, Ae ree Kim, Nam Hee Won, Kye Yong Song; Korean J Pathol. 1996;30(2):161-163.

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Abstract PDF: Large-cell acanthoma is a generally hyperkeratotic, sharply demarcated patch on sun-exposed skin with the outstanding pathologic feature being composed of large, relatively uniform keratinocytes. We describe a case of large-cell acanthoma that involved the skin of the nasal bridge. Patient was a 56-year-old women with a tannish brown patch, 2 cm in size and of 5 years' duration. Controversial issues about nosologic entity of large cell acanthoma are discussed.

Pulmonary Lymphangioleiomyomatosis: Pathologic Analysis of Eight Korean Cases.: Seung Sook Lee, Jeong Wook Seo, Eul Keun Ham, Yong Il Kim, Nam Hee Won, Jung Gi Im, Young Soo Shim; Korean J Pathol. 1994;28(4):358-367.

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Abstract PDF: Histopathology of pulmonary lymphangioleiomyomatosis(LAM) is studied using four new cases and six previously reported cases, which include two cases without definite evidence of LAM. The important diagnostic features of this lesion were nodular proliferation of immature smooth muscle and cleft or cyst formation within the nodules of smooth muscle cells. The nuclei of the smooth muscle cells were bigger than those of blood vessels or fibrotic lung, and the direction of nuclei was irregular. The lung parenchyma showed little inflammatory change but there were multiple air cysts with smooth muscle nodules at their margin. There were two cases with exuberant proliferation of smooth muscle nodules and two cases with papilliferous projections of the cells into lymphatic lumen. Whereas, three cases had only a few small slender nodules of smooth muscle cells at the margin of air cyst. The lymphatic lumen with smooth muscle nodules is dilated in four cases but other four cases show collapsed lumen. Pulmonary hemorrhage and hemosiderosis were prominent in three cases. There were variety of histology in terms of the cellularity of smooth muscle nodules, the size of the lymphatic lumen and the degree of pulmonary destruction, which may have significance on the clinical presentation and prognostication.

Cytodiagnosis of Primary Small Cell Carcinoma of the Urinary Bladder: A Case Report.: Hye Sun Kim, Aee Ree Kim, Chul Hwan Kim, Yang Seok Chae, Nam Hee Won; Korean J Cytopathol. 1994;5(2):167-171.

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Abstract PDF: Samll cell carcinoma of the urinary bladder is a rare tumor which occurs in about 0.48% of all bladder tumors. We report cytologic features of small cell carcinoma of the urinary bladder in a 66-year-old man who had painless total gross hematuria, which was confirmed by partial cystectomy. In urine cytology, abundant tumor cells appeared in scattered and clustered forms in a bloody background. The tumor cells were small and uniform in size with a high nuclear/cytoplasmic ratio. The nuclei of the tumor cells were hyperchromatic, characteristically molded and showed inconspicuous nucleoli. The cytoplasms were scanty and plae blue.

Pulmonary Lymphangioleiomyomatosis: A case report.: Won Bo Jo, Nam Hee Won, Seung Yong Paik, Hae Kyung Ahn; Korean J Pathol. 1991;25(3):269-274.

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Abstract PDF: Lymphangioleiomyomatosis(LAM) is a rare disease of women of child-bearing age in which there is progressive hyperplasia of atypical smooth mucle along lymphatics in the lung, and/or axial lymphatics in the thorax and abdomen, resulting in honeycombing of lung. Interestingly there has been a speculation that it represents a forme furste or incomplete expression of tuberous sclerosis complex. This is based on the observation that patients with tuberous sclerosis can manifest pulmonary lesions indistinguishable from LAM. We report a case of LAM occuring in a 39-year-old female, who complained of recurrent pneumothorax, chest pain and shortness of breath. Three years ago, the patient had right nephrectomy under the diagnosis of ruptured angiomyolipoma. A X-ray film of the chest showed honeycombing with a diffusely reticulonodular pattern and cyst-like spaces. She had a characteristic facial appearance of adenoma sebaceum, which her father and uncle had. Microscopically, the lung showed a marked smooth muscle proliferation around the slit-like lymphatic spaces and also some respiratory bronchioles.

An Immunohistochemical Study of PNA (peaunt agglutinin) Binding in Transitional Cell Carcinomas of the Urinary Bladder.: Chul Hwan Kim, Nam Hee Won, Kap No Lee; Korean J Pathol. 1990;24(3):227-235.

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Abstract PDF: Recently, extensive uses of lectins as cytochemical markers have made of studies for various epithelial and nonepithelial neoplasia, however, investigations of epithelial cell surface of transitional cell carcinomas of the urinary bladder have been few. Thus, the atuhors performed a study of PNA binding in the authors performed a study of PNA binding in transitional cell carcinomas with comparision with that in normal mucosa of the urinary bladder to allow more accurate diagnosis and histological grade or degree of differentiation. The results of this study are as follows: 1) PNA shows negative reactions on all ten normal mucosae of the urinary bladder but positive staining at the glycocalyx of umbrellar cells in two cases. 2) PNA shows negative reactions on all four cases of von Brun'n nests and cystitis cystica. 3) PNA shows positive reactions on thirty (50%) of total sixty-one cases of transitional cell carcinomas and reveals two (20%), nine (41%), eleven (55%) and eight (88%) cases in grade I, II, III and IV, respectively. 4) PNA shows positive reactions on the intracytoplasm and/or degree of PNA binding activity in grade I to IV transitional cell carcinomas is not statistically significantly different (p>0.05). In summary, PNA did not react with normal nucosa and metaplastic lesions such as von Brunn's nests and cystitis cystica, however, it reacted with 50% (30/61 cases) of transitional cell carcinoma and its positivity is significantly increased with gradings of transitional cell carcinomas (p<0.05).

Ectopic Hamartomatous Thymoma: A case report.: Joon Mee Kim, Nam Hee Won, Seung Yong Paik; Korean J Pathol. 1990;24(1):50-57.

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Abstract PDF: A 49-year old man was admitted to the Korea university hospital, department of surgery, for evaluation of anterior neck mass which was slowly growing for five years. His past history was unremarkable except for known hypertension for several years. Physical examination revealed high blood pressure, measuring 180 mmHg in systolic phase and 120 mmHg in diastolic phase. A soft nontender mass was palpated at anterior neck just above the sternal notch with smooth surface and its size was about 4 x 5 cm in cross. On laboratory examination, diabetic evidence such as high blood sugar (FBS 170 mg/dl, PP2hr. 234 mg/dl) and glucosuria. The CBC finding suggested polycythemia with high hemoglobin (18.0 g/dl) and hematocrit (54%) levels. The differential count and platelet count were within normal limits.

Fabry's Disease: A case report of electronmicroscopy and enzyme studies.: Joon Mee Kim, Joung Ho Han, Nam Hee Won, Seung Yong Paik; Korean J Pathol. 1988;22(3):289-294.

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Abstract PDF: Fabry's disease is a rare hereditary metabolic disease caused by alpha-galactosidase deficiency, resulting in abnormal accumulation of galactosyl galactosyl galactosyl ceramide (ceramide trihexoside) in various organs. Articles in English reported approximately one hundred cases but only two cases in Korea. Recently the authors experienced a case of Fabry's disease of a male patient and studied the electronmicroscopy on skin biopsied tissue and enzyme assay of alpha -galactosidase activity in his peripheral blood leukocytes. The male patient was a 21-year-old soldier who suffered from anhidrosis with heat intolerance and generalized telangietatic papules (Angiokeratoma corporis diffusum) since childhood. Other clinical findings were ocular change, paroxysmal pain of lower extremities and proteinuria with oval fat bodies on urinalysis. The ultrastructural study of skin demonstrated abnormal lysosomal deposits of finger-prints or "zebra" body configuration in the endothelial cells, pericytes, perineural cells and intercalated ductal epithelium of sweat glands. Enzyme activity of alpha-galactosidase was markedly decreased in the peripheral blood leukocytes comparing to the normal control, which was conclusive to make a diagnosis of Fabry's disease.

Plexiform Schwannoma.: Kyo Beom Lee, Yang Seok Chae, Nam Hee Won, Seung Yong Paik; Korean J Pathol. 1988;22(1):105-109.

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Abstract PDF: Three case of plexiform schwannoma displayed multinodular masses and microscopically a multicentric pattern of growth featuring Antoni A cellular component, Verocay bodies and presence of Antoni B areas. Clinically von Recklinghausen's disease was not observed in all cases. The first patient was a 17 year old male who had a protruding nodule of walnut size which was located at the dermis of the left flank for 13 years. The second case, a 25 year old male, had an irregular whitish brown multinodular mass in the choana for 5 years. The last case, a 56 year old woman, had an ovoid yellowish brown mass with multiple nodules in the retroperitoneum.

Gastrointestinal Tumors Associated with von Recklinghausen's Neurofibromatosis: A report of two cases.: Mee Ja Park, Hye Yeon Kim, Nam Hee Won, In Sun Kim, Kap No Lee, Seung Yong Paik; Korean J Cytopathol. 1985;19(3):345-349.

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Abstract PDF: Neurofibromatosis, first clearly described by von Recklinghausen in 1882, is a dominantly inherited mesodermal and ectodermal dysplasia with a broad spectrum of clinical findings. Most common is the classical neurofibromatosis, which has three major features: (1) multiple neural tumors dispersed anywhere on or in the body; (2) numerous pigmented skin lesions, some of which are "cafe au lait" spots; and (3) pigmented iris hamartomas also called Lisch nodules. Other lesions sometimes seen in patients with von Recklinghausen's disease include congenital malformations of various types, vascular lesions, neurilemoma meningioma and other intracranial neoplasms, pheochromocytoma, medullary carcinoma of thyroid gland, neuroblastoma, ganglioneuroma and Wilms' tumor. Approximately 10% of the patients with neurofibromatosis have the gastrointestinal tract tumors as neurofibroma, ganglioneuroma and leiomyoma. Some of them show evidence of malignancy. Increased activity of the protein "nerve growth factor" in the sera of the patients with disseminated neurofibromatosis has been reported. We would like to report here two cases of von Recklinghausen's neurofibromatosis with involvement of the gastrointestinal tract.

Aggressive Osteoblastoma: A case report.: Mi Kyung Shin, Nam Hee Won, Jong Sang Choi, Seung Yong Paik; Korean J Cytopathol. 1985;19(1):136-139.

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Abstract PDF: Osteoblastoma is a rare tumor which forms osteoid and bone with highly vascular stroma, account for less than 1 percent of all bone tumors. The lesion had been thought to be controlled with curettage and locat excision. In recent years, cases of locally aggressive but not metastasizing osteoblastomas have been described as aggressive osteoblastoma or malignant osteoblastoma, separated from the innocuous behavior of usual osteoblastoma. It represents the histologic characteristics of the presence of epithelioid osteoblasts, trabecular rather than lace-like osteoid, low mitotic rate with no atypical form with prominent giant cells of osteoclastic type The differential diagnosis between aggressive osteoblastoma and osteogenic sarcoma is extremely difficult, but its peculiar histologic pattern and ist different clinical and radiologic features and better prognosis are helpful. We report here a case of aggressive osteoblastoma of 17 years old female patient with 2 years and 5 months follow-up period and review the literature.

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