Journal of Pathology and Translational Medicine

Ghee Young Kwon

7 Articles

Prognostic Significance of Methylation Profiles in Urothelial Carcinomas of the Bladder.: Hee Jung Park, Eui Jin Lee, Sang Yun Ha, Ghee Young Kwon, Young Lyun Oh, Kyoung Mee Kim, Dae Shick Kim, Seongil Seo, Hyun Moo Lee, Han Yong Choi; Korean J Pathol. 2010;44(6):623-630.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.6.623

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BACKGROUND
Study on epigenetics of urothelial carcinomas has expanded and allowed better understanding of their correlation with clinicopathologic features. The aim of this study was to determine reliable predictive epigenetic markers for patients with urothelial carcinoma of urinary bladder.
METHODS
In 64 urothelial carcinomas of the urinary bladder, methylationspecific polymerase chain reaction with RAS association domain family 1A (RASSF1A), adenomatous polyposis coli (APC), death-associated protein-kinase (DAPK), runt-related transcription factor 3 (RUNX3), p14, p16 and MGMT was performed and correlated the results with p53 mutations, DNA ploidy, clinicopathologic parameters and recurrences.
RESULTS
Hypermethyation of RASSF1A, APC, DAPK, RUNX3, p14, p16 and MGMT promoters was observed in 35 (54.7%), 29 (45.3%), 18 (28.1%), 18 (28.1%), 9 (14.1%), 2 (3.1%), and 6 (9.4%) cases, respectively. Hypermethylation of RUNX3 and APC was significantly associated with high histologic grades and aneuploidy. Methylation of DAPK was significantly associated with muscle invasion. Methylation of DAPK and RUNX3 genes was significantly associated with recurrence. In survival analyses, methylation of RUNX3 gene and methylation-high (methylation at two or more loci) phenotype was significantly associated with poor recurrence-free survival.
CONCLUSIONS
Methylation of RUNX3 gene and methylation-high phenotype are significant indicator of recurrence.

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DAPK Promoter Methylation and Bladder Cancer Risk: A Systematic Review and Meta-Analysis
Lihe Dai, Chong Ma, Zhensheng Zhang, Shuxiong Zeng, Anwei Liu, Shijie Tang, Qian Ren, Yinghao Sun, Chuanliang Xu, Shengtao Zhou
PLOS ONE.2016; 11(12): e0167228. CrossRef

Epstein-Barr virus-associated Inflammatory Pseudotumor-like Follicular Dendritic Cell Tumor in the Spleen of a Patient with Diffuse Large B Cell Lymphoma: A Case Report and Review of the Literature.: Sun Och Yoon, Hyoungsuk Ko, Baek hui Kim, Ghee Young Kwon, Yoon Kyung Jeon, Chul Woo Kim; Korean J Pathol. 2007;41(3):198-202.

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Abstract PDF: We report a case of an Epstein-Barr virus (EBV)-associated inflammatory pseudotumor-like follicular dendritic cell tumor (IPT-like FDC tumor). The tumor occurred in the spleen of a 64-year-old woman with a history of a diffuse large B-cell lymphoma (DLBCL) of neck nodes that presented four years ago. The splenectomy specimen revealed a 5 cm-sized, tan-colored and well-circumscribed mass. Histologically, spindle or ovoid cells with large vesicular nuclei were admixed with abundant inflammatory cells. Immunohistochemically, spindle cells were positive for FDC marker CD35, but negative for CD20, CD30 and ALK. EBV was detected almost exclusively in spindle cells by EBER in situ hybridization. IPT-like FDC tumors are rare, and are recognized as a distinctive clinicopathologic variant of FDC tumors. Among only 18 similar cases reported in the English language literature, the present case is the first case of a patient with a history of DLBCL.

Clinicopathological Analysis of Growth Patterns of Malignant Intraductal Papillary Mucinous Tumors of the Pancreas: Unusual Growth Pattern of Fistulous Extension.: Kee Taek Jang, Ghee Young Kwon, Geunghwan Ahn; Korean J Pathol. 2007;41(1):38-43.

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Abstract PDF: BACKGROUND
Usually, a malignant intraductal papillary mucinous tumor (IPMT) of the pancreas shows invasive carcinoma. Recently, IPMT with an unusual growth pattern of a fistulous extension was reported. However, little is known about malignant IPMTs with a different growth pattern of invasion and fistulous extension.
METHODS
Malignant IPMTs were classified into invasive (colloid or tubular type) carcinomas and the fistulous extension type according to their growth patterns. Their clinicopathological characteristics were compared.
RESULTS
Among a total of 68 cases of IPMT, there were 16 cases with malignant IPMT; eight, six and two of the colloid, tubular, and fistulous extension types, respectively. The immunohistochemical (IHC) expression of MUC1 was found in seven out of eight colloid and five out of six tubular types, but there was no IHC expression of MUC1 in the fistulous extension type. The IHC expression of MUC2 was noted in one of the eight colloid, one of the six tubular and in both cases with the fistulous extension type. There was no difference in the tumor recurrence rates bet- ween the different growth patterns.
CONCLUSIONS
IPMT with the fistulous extension type has a peculiar extension pattern consisting of multiple fistulous tracts without a mass. Although most of the epithelium in the fistulous tract show moderate to severe dysplasia, only the fistulous extension should be considered to be an unusual growth pattern of malignant IPMT. The clinical significance of this unusual type of IPMT remains to be determined.

Pathological Findings of Crohn's Disease in the Stomach .: Changyoung Yoo, Bo In Lee, Kyu Yong Choi, Lee So Maeng, Anhi Lee, Chang Suk Kang, Ghee Young Kwon, Kyoung Mee Kim, Cheol Keun Park; Korean J Pathol. 2006;40(4):269-273.

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Abstract PDF: BACKGROUND
The incidence of Crohn's disease in the upper digestive tract, and especially in the stomach, is recently increasing. Focal inflammatory reaction without Helicobacter pylori (H. pylori) infection is thought to be the characteristic pathologic findings suggesting Crohn's disease in the stomach. Yet gastric involvement of Crohn's disease has not been studied in Korea. We studied the endoscopic and pathologic findings of patients with Crohn's disease in the stomach by taking biopsies.
METHODS
Thirty patients with Crohn's disease who underwent gastroduodenoscopy followed by biopsies were included in the study. The pathology of the gastric biopsy specimens and the presence of H. pylori were evaluated.
RESULTS
Among 30 cases, 22 cases (73.3%) were H. pylori negative and 8 cases (26.7%) were H. pylori positive. For the H. pylori negative cases, all but one cases showed pit abscess and focal lymphocytic collections in the antrum. Granulomas were found in 6 cases (20%) and they were exclusively located in the antrum.
CONCLUSIONS
In the stomach, pit abscess and focal lymphocytic collections that are not associated with H. pylori infection are the characteristic pathologic findings found in Crohn's disease.

Deletion within LMP-1 Oncogene in Hodgkin's Disease in Korea.: Ghee Young Kwon, Woo Sung Ahn, Bo Young Lee, Seung Sook Lee, Jooryung Huh, Chul Woo Kim; Korean J Pathol. 1998;32(9):638-646.

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Abstract: LMP (latent membrane protein)-1 protein is one of the Epstein-Barr viral proteins and it is the most crucial one for the transforming activity. It is known to show considerable variation in its nucleic acid sequence and some biologic difference is reported to be associated with the variation. Twenty four cases of the EBV-associated Hodgkin's disease cases were searched for the 30-bp deletion within the C terminal intracytoplasmic domain of LMP-1 oncogene, one of the well-known genetic variation, by PCR and Southern blot using selected sets of primers and probes. The strain of the virus was also determined with PCR. Each case was positive both on LMP-1 immunostaining and in situ hybridization for EBER (Epstein-Barr encoded RNA). Deletion within LMP-1 oncogene was identified in 22 cases (92%), of which 5 cases showed wild form as well as a deleted form of LMP-1 at the same specimens. In seven cases showing the non-deleted form, pure or mixed with a deleted form, the distribution of sex and age was similar to that of the deleted form-only-group, but there was a slight tendency for a higher stage at presentation (4 of the 7 cases presented with stage IV). Those seven cases comprised of 4 cases of nodular sclerosis (NS), 2 cases of mixed cellularity (MC) and a case of lymphocyte depletion subtype while there were 9 and 12 cases of NS and MC among all the examined cases, respectively. Two cases with both a deleted form and the non-deleted form of LMP-1 showed type I and II strain of the virus while all the others contained only type of the. In conclusion, the rate of deletion in LMP-1 oncogene in our series was higher than that reported in western countries and there was a slight tendency for higher stages in cases detecting mixed deleted and non-deleted forms of LMP-1 than in cases a of deleted from of LMP-1.

Alveolar Soft Part Sarcoma of the Uterine Cervix: A case report.: Ghee Young Kwon, Yeon Lim Suh; Korean J Pathol. 1996;30(10):933-938.

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Abstract PDF: We report a case of alveolar soft part sarcoma(ASPS) of the uterine cervix in a 57-year-old female. She was presented with vaginal bleeding and underwent total hysterectomy. A 1.1cm-sized, polypoid mass was found at the uterine cervix. Microscopically, it had shown an alveolar arrangement of tumor cells and characteristic Periodic acid-Schiff-positive, diastase-resistant, intracytoplasmic granules. Distinct cytoplasmic crystals were found on the ultrastructural examination and tumor cells showed immunoreactivity for smooth muscle actin, myoglobin and neuron-specific enolase, while nonreactive for desmin, vimentin and S-100 protein. Myogenic origin can be suggested with these immunohistochemical results.

Detection of bcl-2/IgH Gene Rearrangement and Expression of c-myc and p53 Oncoprotein in B-cell Lymphoma.: Ghee Young Kwon, Chul Woo Kim; Korean J Pathol. 1996;30(5):437-446.

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Abstract PDF: Many kinds of genetic changes have been known to be associated with malignant lymphoma and bcl-2, p53 and c-myc are some examples. We investigated the expression of p53 and c-myc protein in follicular and diffuse B cell lymphoma by immunohistochemistry to study the possible role of these proteins in the lymphomagenesis and transformation of the tumor. The rearrangement of bcl-2 oncogene and the immunoglobulin heavy chain gene was searched for in those cases by polymerase chain reaction(PCR). Paraffin-embedded tissues of fifteen follicular lymphomas and 14 diffuse lymphoma cases were used. The results of immunohistochemical staining are summarized as follows: 1) p53 positivity is significantly higher in diffuse lymphoma than in follicular lymphoma(P=0.001); 2) c-myc expression is not increased in diffuse lymphoma compared with follicular lymphoma; 3) PCNA index is significantly higher in diffuse lymphoma than in follicular lymphoma(P=0.03) but there was no statistically significant correlation between PCNA index and p53 positivity(P=0.44); 4) Eight out of 14 cases of follicular lymphoma and 12 of 14 cases of diffuse lymphoma showed rearrangement of the immunogloblulin heavy chain gene; 5) bcl-2 oncogene rearrangement was identified in only one case of follicular lymphoma and all the diffuse type lymphomas were negative in bcl-2/IgH rearrangement. In conclusion, assuming that the follicular pattern of B-cell lymphoma often transforms to diffuse type in later stages, c-myc over-expression might be an earlier event than p53 mutation in the process of tumor progression in B-cell lymphoma. bcl-2/IgH gene rearrangement in follicular lymphoma is a rare finding in Korea compared to that of Western countries.

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