Journal of Pathology and Translational Medicine

Do Youn Park

19 Articles

Molecular Biological Characteristics of Differentiated Early Gastric Cancer on the Basis of Mucin Expression.: Nari Shin, Hye Yeon Kim, Woo Kyung Kim, Min Gyung Park, Kyung Bin Kim, Dong Hoon Shin, Kyung Un Choi, Jee Yeon Kim, Chang Hun Lee, Gi Young Huh, Mee Young Sol, Do Youn Park; Korean J Pathol. 2011;45(1):69-78.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.1.69

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BACKGROUND
It is clear that the biologic characteristics of gastric cancer are different on the basis of mucin phenotypes. However, there are unabated controversies on the exact biologic differences of mucin expression in gastric cancer.
METHODS
We analyzed various protein expressions and microsatellite instability (MSI) status based on mucin expression in 130 differentiated early gastric adenocarcinoma cases. Furthermore, we evaluated the genomic alternation in 10 selected differentiated early gastric adenocarcinoma cases using array based comparative genomic hybridization (aCGH).
RESULTS
Intestinal mucin predominant subtype showed significantly elevated p53 protein and caudal-related homeobox 2 expression, and delocalization of beta catenin expressions compared to the gastric mucin predominant subtype. On MSI status, the gastric mucin predominant subtype more frequently showed unstable status than the intestinal mucin predominant subtype. CGH study showed more frequent chromosomal gain and loss in the intestinal mucin predominant subtype than the gastric mucin predominant subtype, albeit without statistical significance. Interestingly, there were significant differences in chromosomal alternation between four mucin phenotypes.
CONCLUSIONS
Study results suggest possible different points of biologic behaviors in early differentiated gastric adenocarcinomas by mucin expression type.

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Mucin Expression in Gastric Cancer: Reappraisal of Its Clinicopathologic and Prognostic Significance
Dae Hwan Kim, Nari Shin, Gwang Ha Kim, Geum Am Song, Tae-Yong Jeon, Dong-Heon Kim, Gregory Y. Lauwers, Do Youn Park
Archives of Pathology & Laboratory Medicine.2013; 137(8): 1047. CrossRef
Microsatellite Instability Status in Gastric Cancer: A Reappraisal of Its Clinical Significance and Relationship with Mucin Phenotypes
Joo-Yeun Kim, Na Ri Shin, Ahrong Kim, Hyun-Jeong Lee, Won-young Park, Jee-Yeon Kim, Chang-Hun Lee, Gi-Young Huh, Do Youn Park
Korean Journal of Pathology.2013; 47(1): 28. CrossRef

Expression of p63 and its Isoform, deltaNp63, in Non-Small Cell Lung Carcinoma.: Ick Doo Kim, Dong Hoon Shin, Kyung Un Choi, Do Youn Park, Gi Yeong Huh, Mee Young Sol, Min Ki Lee, Young Dae Kim, Chang Hun Lee; Korean J Pathol. 2009;43(4):321-328.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.4.321

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Abstract PDF: BACKGROUND
Several studies have been conducted on the role of the p63 gene family in non-small cell lung carcinoma (NSCLC). Nevertheless, the role of these genes in the development and progression of NSCLC remains controversial. This study was designed to examine the expression and clinicopathologic significance of the p63 family in NSCLC.
METHODS
Immunohistochemical staining was performed on 92 cases of NSCLC (47 squamous cell carcinomas [SqCCs] and 45 adenocarcinomas [ACs]) using tissue microarray blocks. The results were analyzed and correlated with clinicopathologic data. RESULTS: The expression of delta Np63 (Delta Np63) was elevated in SqCC (39/47), but not in AC (2/45; p<0.01). Both p63 and Delta Np63 had high expression in 39 SqCCs; p63 and Delta Np63 also had a similar geomorphologic distribution in most positive tumors. The expression of Delta Np63 was correlated with histologic type, gender, pT stage, p53 expression, and p63 expression. pT and pN stages were independent factors in survival (p<0.05, respectively).
CONCLUSIONS
The major p63 isoform in NSCLC, Delta Np63, had a strong correlation with p53 and p63, and was exclusively expressed in SqCC. However, our findings suggest that Delta Np63 was not an independent prognostic factor for NSCLC.

Assessment of Apoptosis by M30 Immunoreactivity and the Relationship with the MSI status and the Clinicopathological Characteristics of Colorectal Carcinomas.: Hyun Jeong Kang, Mee Young Sol, Do Youn Park, Soo Han Lee, Dong Hun Shin, Jee Yeon Kim, Kyung Un Choi, Hwal Woong Kim, Chang Hun Lee, Gi Young Huh; Korean J Pathol. 2006;40(5):319-325.

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Abstract PDF: BACKGROUND
The monoclonal antibody M30 recognizes a neoepitope of cytokeratin 18 that's produced during the process of apoptosis, and it is reactive in formalin-fixed, paraffin-embedded tissue. The detailed nature of apoptosis in colorectal cancer is unclear, especially in regard to the MSI status and the clinicopathologic factors. The purpose of this study was to elucidate the apoptosis assessed by M30 immunoreactivity in colorectal cancer and its relationship with the MSI status and the various clinicopathologic factors of colorectal cancers.
METHODS
101 colorectal cancers were classified according to levels of MSI as 12 MSI-H, 4 MSI-L and 85 MSS. Apoptosis was quantified by immunohistochemistry with using M30 CytoDEATH anti-body.
RESULTS
The apoptotic index assessed by M30 was significantly increased in the MSI-H and MSI-L colorectal cancer compared to that in the MSS colorectal cancer. Right sided colon cancer showed a significant higher apoptotic index than did the left sided colon cancer. There was also a tendency for decreased apoptosis in metastatic colorectal cancers (Duke's stage D). There was somewhat of an increase of apoptosis in colorectal cancers with mucinous carcinoma and medullary carcinoma, and also in the colorectal cancers with an increased TIL count, but this was not statistically significant.
CONCLUSION
M30 immunoreactivity is a valuable method to detect apoptosis in formalin-fixed, paraffin-embedded tissue and it might explain that MSI-H colorectal cancer shows better clinical behavior than MSS colorectal cancer in regard to the increased apoptosis.

Altered Expression of DNA Topoisomerase IIalpha, Ki-67, p53 and p27 in Non-Hodgkin's Lymphoma.: Kyeong Min Lee, Mee Young Sol, Hyun Jeong Kang, Dong Hoon Shin, Kyung Un Choi, Hwal Woong Kim, Jee Yeon Kim, Do Youn Park, Chang Hun Lee; Korean J Pathol. 2005;39(5):332-337.

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Abstract PDF: BACKGROUND
Topoisomerase II (TOPO II) is an enzyme that separates intertwined chromosomes during DNA synthesis by transiently breaking and joining DNA strands. The level of TOP II is one of the determinants of cellular sensitivity to anti-tumor drugs in non-Hodgkin's lymphoma patients. The alpha form of TOPO II has been recently used as a marker of cellular proliferation. High levels of TOPO IIalpha are expressed in aggressive and proliferative tumors.
METHODS
This study was designed to evaluate the relationship between TOPO IIalpha expression and clinicopathological parameters including age, gender, the serum LDH level, the serum beta2-microglobulin level and stage, or expressions, of Ki-67, p53 and p27, in non-Hodgkin's lymphoma. We analyzed forty-one biopsied tissue specimens from patients with non-Hodgkin's lymphoma.
RESULTS
The expression of TOPO IIalpha increased with the clinical stage and it was correlated with Ki-67 and p53 expressions. However, TOPO IIalpha expression did not have any significant correlation with age, gender, the serum LDH level, the serum 2-microglobulin level and the p27 expression.
CONCLUSIONS
TOPO IIalpha expression is a useful marker of cellular proliferation and it may serve as a prognostic factor of a tumor's progression and aggressiveness in non-Hodgkin's lymphomas.

Cytologic Features of Pseudoangiomatous Stromal Hyperplasia of the Breast: A Case Report with Review of Literature.: Jin Sook Lee, Jee Yeon Kim, Dong Hoon Shin, Do Youn Park, Kyung Un Choi, Chang Hoon Lee, Mee Young Sol; Korean J Cytopathol. 2005;16(1):25-30.

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Abstract PDF: Pseudoangiomatous stromal hyperplasia(PASH) was initially described by Vuitch et al. as a benign breast lesion, consisting of mammary stromal proliferations which simulate vascular lesions, and which might be mistaken for a low-grade angiosarcoma. This condition occasionally presents as a palpable mass in postmenopausal women, but is more frequently encountered as an incidental component in premenopausal women. Clinical, radiological, and fine-needle aspiration(FNA) findings associated with this condition can mimic those observed in conjunction with a phyllodes tumor or a fibroadenoma. The cytological features of PASH are generally nonspecific, and its diagnosis by FNA cytology is fairly difficult. In this study, we report a case of PASH, manifesting as a palpable mass

Analysis of Gene Expression in Renal Cell Carcinomas Using cDNA Microarray: Reduced Expression of Decorin in Renal Cell Carcinomas.: Jin Sook Lee, Kang Suek Suh, Kyung Un Choi, Jee Yeun Kim, Do Youn Park; Korean J Pathol. 2003;37(4):232-238.

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Abstract PDF: BACKGROUND
Identification of the genes expressed differentially in renal cell carcinoma (RCC)but not in the non-cancerous kidney is important for understanding the molecular basis ofrenal cell carcinoma and for defining possible prognostic value and therapeutic intervention.We investigated the changes in gene expression accompanying the development and progression of kidney cancer by cDNA microarrays.
METHODS
To identify molecular alterations in renal cell carcinoma, we measured expression profiles for paired neoplastic and noncancerouskidney samples from an individual by means of a cDNA microarry representing 7, 500genes. Of the differentially expressed genes, we assessed the decorin gene at the proteinlevel using immunohistochemistry.
RESULTS
The 60 genes were noted to have more than a fivefold change in expression (either increased or decreased) in RCC compared to the noncancerouskidney. The changed genes are those associated with signal transduction, metabolizingenzymes, the cytoskeleton, cell adhesion, cell cycle control, modulation of transcription, the tumor suppressor gene and tumor antigens. Under immunohistochemistry, the expressionof decorin was significantly decreased in the tumor than in the non-cancerous kidney.The expression rate of decorin was not associated with the patient's sex, age, histologic type, Fuhrmann nuclear grade and T stage.
CONCLUSION
The author predicted that these geneexpression profiling experiments will lead to improvements in the basic understanding of renaltumor pathogenesis and will promote the discovery of novel molecular markers for renal tumordiagnosis and therapy.

Overexpression of Insulin-like Growth Factor Binding Protein 3 in Colorectal Carcinoma Identified by cDNA Microarray and Immunohistochemical Analysis.: Kyung Un Choi, Do Youn Park, Jee Yeon Kim, Jin Sook Lee, Mee Young Sol; Korean J Pathol. 2003;37(3):166-173.

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Abstract PDF: BACKGROUND
Insulin-like growth factor binding protein 3 (IGFBP3), a member of six proteins with a high affinity for insulin-like growth factors (IGFs), seems to modulate the effects of IGFs on cells and to regulate cell proliferation through the IGF-independent pathway. We assessed the role of IGFBP3 in the colorectal carcinoma detected by cDNA microarray.
METHODS
To identify molecular alterations in the colorectal carcinoma, we analyzed gene expression profiles of the colorectal adenocarcinoma by means of a cDNA microarray representing 7,500 genes. Of the differentially expressed genes, the author assessed the insulin-like growth factor binding protein 3 (IGFBP3) gene at the protein level using immunohistochemistry.
RESULTS
The expressions of 21 and 16 genes were noted to have more than fivefold increases or decreases in the colonic adenocarcinoma tissue compared with the noncancerous colonic mucosal tissue. The differentially expressed genes include those associated with cell proliferation/apoptosis, signal transduction/transcription, metabolizing enzymes, cytoskeleton, angiogenesis, ion channel, extracellular matrix and others. Of the total 68 cases of colorectal adenocarcinomas observed, 34 cases (50%) showed positive immunohistochemical stainings for IGFBP3.
CONCLUSIONS
In this study, it is suggested that IGFBP3 plays a role in colorectal carcinogenesis. And combining an immunohistochemistry with a cDNA microarray can facillitate the rapid characterization of a candidate novel molecular target.

Experimental Liver Disease Models of Rats: Morphological Characteristics.: Do Youn Park, Kang Suek Suh; Korean J Pathol. 2003;37(3):151-158.

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Abstract PDF: Experimental liver disease models of rats have many similarities with those of humans, especially in morphological characteristics. Rat liver disease models can be categorized as models of hepatic fibrosis, hepatic stem cell and hepatocarcinogenesis. The purpose of this article is to review experimental liver disease models, with a major emphasis on morphologic features, including routine morphological, immunohistochemical, and electron microscopic features.

Smad4 Expression in Gastric Adenocarcinoma.: Hyeon Ok Kim, Do Youn Park, Kang Suek Suh; Korean J Pathol. 2003;37(2):93-99.

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Abstract PDF: BACKGROUND
The role of Smad4 in carcinogenesis is important, because of its function as a central mediator of TGF-beta signaling. In the present study we analyzed the expressions of Smad4 mRNA and protein in human gastric cancer cell lines and tissues and we also analyzed their clinicopathological significance.
METHODS
We used semi-quantitative RT-PCR for Smad4 mRNA expression in 13 cases of fresh gastric cancer tissues and two gastric cancer cell lines (MKN-28, SNU-1). We also used immunohistochemistry for Smad4 protein expression in 88 cases of formalin fixed gastric cancers tissues.
RESULTS
The mRNA level of Smad4 was higher in MKN-28 cell line (intestinal type) than in the SNU-1 cell line (diffuse type). Fresh frozen gastric cancer tissues showed that the intestinal type of gastric cancer had higher Smad4 mRNA expressions than the diffuse type of gastric cancer (p<0.05). Immunohistochemical staining for Smad4 revealed that cytoplasmic and nuclear expressions of Smad4 were significantly correlated with histologic types of gastric cancer (p<0.05). That is, the intestinal type of gastric cancer showed more cytoplasmic and nuclear smad4 expressions than did the diffuse type of gastric cancer. Reduced cytoplasmic expressions and positive nuclear expressions of Smad4 were more prominent in the advanced gastric cancer than in the early gastric cancer.
CONCLUSION
Taken together, we suggest that loss of Smad4 expression might be associated with the intestinal type of gastric cancer. Also reduced cytoplasmic Smad4 expressions and increased nuclear Smad4 expressions may be associated with the advanced stage of gastric cancer.

Expression of TGF-beta1 and TGF-betatype II Receptor in Chemically Induced Hepatocarcinogenesis of the Rat.: Do Youn Park, Kang Woo Park, Kang Suek Suh; Korean J Pathol. 2003;37(2):121-128.

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Abstract PDF: BACKGROUND
Transforming growth factor (TGF)-beta1 inhibits hepatocyte proliferation by inducing apoptosis. Expression of TGF-beta1 is tightly associated with the TGF-betatype II receptor (TGR2) expression level, and has been regarded as an important change of TGF-beta1 and TGR2 during hepatocarcinogenesis. We investigated the gene expressions and protein localizations of TGF-beta1 and TGR2 in chemical hepatocarcinogenesis.
METHODS
Solt and Farber's method was used as the chemical hepatocarcinogenesis model of the rat. Northern blot analyses and immunohistochemistry for TGF-beta1 and TGR2 were performed to investigate the gene expressions and protein localizations, respectively.
RESULTS
The Northern blot analyses showed a slight increase of TGF-beta1 transcripts one month after partial hepatectomy, which is more than in sham operated control liver, and a decrease of transcripts for TGR2 two months after partial hepatectomy. The number of TGF-beta-positive preneoplastic hepatocytes was increased and correlated with the increase of the number of TGR2 negative hepatocytes or reduction of expressions of TGR2 in preneoplastic lesions. HCC tissues showed an increase of TGF-beta1 protein expressions and a decrease of TGR2 compared to the adjacent liver parenchyme.
CONCLUSION
Our data suggest that down regulation of TGR2 in preneoplastic lesions and HCC might contribute to the resistance to the growth inhibitory effects of TGF-beta.

Cytologic Features of Fine Needle Aspirates of Hyalinizing Trabecular Adenoma with Occult Papillary Carcinoma of the Thyroid.: Kyung Un Choi, Jee Yeon Kim, Jin Sook Lee, Do Youn Park, Chang Hoon Lee, Mee Young So, Kang Suek Suh; Korean J Cytopathol. 2003;14(1):7-11.

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Abstract PDF: Hyalinizing trabecular adenoma of the thyroid gland is a rare benign neoplasm predominantly diagnosed in middle-aged women. Carney et al. first described this entity that may mimic paraganglioma, medullary carcinoma and papillary carcinoma in 1987. We describe cytologic and histopathologic features of a case of hyalinizing trabecular adenoma combined with occult papillary carcinoma in the opposite lobe. A 55-year-old woman presented with nontender palpable mass of the right neck for 6 months. The aspirate was cellular and contained small clusters and sheets of epithelial cells with abundant filamentous, vacuolated, and ill-defined cytoplasm. The nuclei were slightly pleomorphic and showed nuclear overlapping, nuclear grooves, and intranuclear cytoplasmic inclusions. Histologic examination showed hyalinizing trabecular adenoma in the right lobe and occult papillary carcinoma in the left lobe.

Expression of Fas/Fas Ligand and Its Relationship with Apoptosis in Chemically Induced Preneoplastic Lesions in Rat Liver.: Hye Jin Lee, Do Youn Park, Kyung Un Choi, Jee Yeon Kim, Chang Hun Lee, Mee Young Sol, Kang Suek Suh; Korean J Pathol. 2001;35(5):383-390.

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Abstract PDF: BACKGROUND
Apoptosis of hepatocytes plays a major role in experimental hepatocarcinogenesis of rats. But sequential change and localization of Fas and Fas ligand (FasL) in preneoplastic lesions and the relationship with apoptosis are not clearly elucidated.
METHODS
We investigated sequential change and localization of Fas/FasL and its relationship to apoptosis in preneoplastic lesions of chemical hepatocarcinogenesis in rats using northern blot analysis, immunohistochemistry and terminal deoxynucleotidyl transferase end labeling (TUNEL) assay.
RESULTS
We found that mRNA of Fas and Fas ligand increased for up to 42 days and 14 days after partial hepatectomy, respectively, and thereafter decreased with time. Fas protein was localized on the cytoplasm of hepatocytes of preneoplastic lesions, as well as on the cytoplasmic membrane of the adjacent liver parenchyme. Fas negative preneoplastic lesions were evident at 42 days after partial hepatectomy. FasL protein was found only in the cytoplasm of hepatocytes of preneoplastic lesions, instead of in the adjacent liver parenchyme. FasL-positive hepatocytes increased with time for up to 14 days after partial hepatectomy and therafter decreased. Also, TUNEL-positive apoptotic cells increased with time and were more numerous in the adjacent liver parenchyme than in the preneoplastic lesions.
CONCLUSIONS
It was suggested that Fas/FasL-mediated apoptosis might be one of the major mechanisms for controlling apoptotic cell death in the promotion stage of chemical hepatocarcinogenesis.

Primary Extragastrointestinal Stromal Tumor (EGIST) of the Greater Omentum.: Kyung Un Choi, Jee Yeun Kim, Do Youn Park, Chang Hun Lee, Mee Young Sol, Kang Suek Suh, Jun Woo Lee; Korean J Pathol. 2001;35(4):347-350.

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Abstract PDF: Gastrointestinal stromal tumors (GISTs) were recently defined as spindle cell, epithelioid, or occasionally, pleomorphic mesenchymal tumors of the gastrointestinal tract that express the CD117 (proto-oncogene c-kit protein, stem cell factor receptor), as detected using immunohistochemistry. And they show a new tendency to include the CD117-positive mesenchymal spindle cell or epithelioid neoplasms primary in the omentum and mesentery, and is so termed extragastrointestinal stromal tumors (EGISTs). Omental EGISTs are very rare and similar to their gastrointestinal counterpart. We present a case of primary EGIST of the greater omentum in a 58-year-old man. The resected tumor mass measured 20X15X5 cm and weighed 1,150 g. The cut surface displayed a central cystic change and partial mural nodules. Microscopically, most parts of the tumor were composed of round or polygonal cells, with many of them containing perinuclear vacuoles. The mitotic count was less than one per 50 high-power-fields. Immunohistochemically, the tumor cells were diffusely positive for CD117 and vimentin, and focally for smooth muscle actin and CD34. Ultrastructurally, partially smooth muscle differentiation was confirmed in this case.

Primary MALT(mucosa-associated lymphoid tissue) Type Lymphoma of the Liver.: Do Youn Park, Jee Yeon Kim, Hyo Jeong Chae, Jin Sook Lee, Chang Hun Lee, Mee Young Sol, Kang Suek Suh, Sun Kyung Lee; Korean J Pathol. 1997;31(12):1317-1319.

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Abstract PDF: Primary non-Hodgkin' lymphomas of the liver, an organ normally devoid of a native lymphoid tissue, are very rare. We recently experienced a case of a primary low-grade hepatic B-cell lymphoma of mucosa-associated lymphoid tissue (MALT) type in a 36-year-old woman. The ultrasonography revealed a 5 cm sized mass in the right lobe of the liver. A right segmentectomy of the liver was done and showed a relatively well-circumscribed brownish yellow lobulated homogenous mass, measuring 5.5x4.5 cm in size. Histologic sections of liver mass revealed large lymphoid follicles with reactive germinal centers, follicular colonization by centrocyte-like cells (CCL cells), and lymphoepithelial lesions. The CCL cells were positive for B-cell (CD20), LCA (CD45RA), Bcl-2 oncoprotein, and lambda light chain.

Cellular Distribution of TGF-beta1 Peptide in Dimethylnitrosamine Induced Fibrosis of Rat Liver.: Sook Nyo Lee, Do Youn Park, Sun Kyung Lee; Korean J Pathol. 1997;31(11):1157-1165.

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Abstract: Recently attention has been focused on the biology of transforming growth factor-beta1 (TGF-beta1). TGF-beta1, a potent regulator of cell proliferation, stimulates the proliferation of many cell types of mesenchymal origin and inhibits the growth of many epithelial cells. But its cellular distribution and temporal expression remain unknown. The aim of this study was to investigate immunohistochemically the cellular distribution and temporal expression of TGF-beta1 during rat hepatic fibrosis induced by dimethylnitrosamine (DMN). At an early stage of liver fibrosis, there was evidence of multiple centrilobular hemorrhagic necrosis with parenchymal lobular collapse, and at a late stage, there was septal fibrosis with micronodule formation of the parenchyme. TGF-beta1 peptide was first expressed in centrilobular clusters of macrophage which were surrounded by many TGF-beta1 negative fat-storing cells (FSCs). Along with the progression of fibrosis, the TGF-beta1 peptide was expressed in the alpha-smooth muscle actin positive FSCs and also in some peripherally located hepatocytes of micronodules. Serum IFN-gamma was detected in the serum 2 weeks after an initial administration of DMN had reached the peak level at the 4th week and then markedly decreased at the 5th week. We think that TGF-beta1 peptide is produced by macrophages influenced by soluble IFN-gamma, and is expressed in the -smooth muscle actin positive mesenchymal cells and regenerating hepatocytes, and that this cytokine may have an important role in the synthesis of the extracellular matrix and in the regulation of hepatocytic regeneration.

Immunohistochemical Study on the Expression of p53 and Bcl-2 Proteins in Non-Small Cell Lung Carcinomas.: Ok Ju Lee, Do Youn Park, Kang Suek Suh; Korean J Pathol. 1997;31(9):823-831.

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Abstract PDF: To address the possible prognostic value of p53 and Bcl-2 proteins in non-small cell lung carcinomas (NSCLCs), the authors studied 43 cases of NSCLCs diagnosed between the years 1990 to 1995 at Pusan National University Hospital. The patients were treated either by pneumonectomy or lobectomy of the lung. The expression of p53 and Bcl-2 proteins was semiquantitatively analyzed in paraffin sections by immunohistochemical method and correlated with clinicopathologic prognostic parameters of NSCLCs. Overexpression of the p53 protein was found in 31 cases (72.1%) of the 43 NSCLCs. Overexpression of the p53 protein was significantly correlated with the decreasing degree of histologic differentiation, increasing tumor stage, and cigarette smoking. Bcl-2 expression was found in 19 cases (44.2%) of the 43 NSCLCs. Increased expression of the Bcl-2 protein was significantly correlated only with decreasing tumor stage. An inverse relationship was found between p53 and Bcl-2 proteins, but it was not statistically significant. Thus p53 and Bcl-2 proteins, as demonstrated immunohistochemically in routine paraffin sections, could be of value in prediction of the aggressiveness and prognosis of NSCLCs, in agreement with the central role of p53 and Bcl-2 proteins in the evolution of NSCLCs associated with cigarette smoking.

Recurred Angiomyofibroblastoma of the Vulva: Report of a case.: Do Youn Park, Ji Yeon Kim, OK Hyeon Kim, Hwa Sun Lee, Mee Young Sol, Kang Suek Suh, Sun Kyung Lee; Korean J Pathol. 1996;30(10):947-950.

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Abstract PDF: Angiomyofibroblastoma is a rare, benign mesenchymal tumor of the vulva. Since it was described in 1992 by Fletcher, 15 cases have been reported in literature. We recently experienced a recurred angiomyofibroblastoma of the vulva. A 45-year-old woman was presented initially in 1991 with a mass of labium major and local excision of tumor mass had been performed. A histologic diagnosis was made of angiomyxoma, but this diagnosis was revised to angiomyofibroblastoma by the authors. The recurred mass was well circumscribed, measuring 2.5x1.6x1.5cm in dimensions. Microscopically the tumor was characterized by high cellularity, numerous blood vessels(which lack prominent hyalinization), and plump stromal cells. Immunohistochemically, the stromal cells were reactive for vimentin and desmin, but not alpha-smooth muscle actin, or S-100 protein. We thought that this case was a recurred angiomyofibrblastoma of the vulva due to incomplete surgical excision.

Epstein-Barr Viral RNA(EBERs) Expression in Conventional Malignant Lymphoma and Polymorphic Reticulosis of Upper Aerodigestive Tract.: Do Youn Park, Kang Suek Suh, Sun Kyung Lee; Korean J Pathol. 1996;30(10):893-902.

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Abstract PDF: The author examined the immunophenotype and expression of Epstem-Barr virus RNA (EBERs) used in the situ hybridization technique in 20 cases of conventional malignant lymphoma and 28 cases of polymorphic reticulosis and malignant lymphoma with features of polymorphic reticulosis occured in the upper aerodigestive tract including the upper digestive tract(palatine tonsil), and upper respiratory tract(nasal cavity, paranasal sinus, nasopharynx). The results obtained were summarized as followings; 1. The favorable site of malignant lymphoma that occured in the upper aerodigestive tract was in the palatine tonsil(11 out of 20 cases, 55%), those of polymorphic reticulosis and malignant lymphoma with features of polymorphic reticulosis were nasal cavity and nasopharynx(19 out of 28 cases, 78%). 2. The immunophentype of malignant lymphoma that occured in the upper aerodigestive tract was mostly B-cell phenotype (15 out of 20 cases, 75%), and that of polymorphic reticulosis and malignant lymphoma with features of polymorphic reticulosis was predominantly T-cell phenotype(22 out of 28 cases, 79%). 3. The EBERs positivity of malignant lymphoma that occured in the upper aerodigestive tract was 25%(5 out of 20 cases), but that of polymorphic reticulosis and malignant lymphoma with features of polymorphic reticulosis was 57%(16 out of 28 cases). 4. The positive cases for EBERs revealed angiocentricity with necrosis(16 out of 21 cases, 76%), predominantly T-cell phenotype(19 out of 21 cases, 90%), and favorably involved the nasal cavity and nasopharynx(16 out of 21 cases, 76%). Based on the above results, it was concluded that polymorphic reticulosis and malignant lymphoma with features of polymorphic reticulosis that occurred in the upper respiratory tract was an EBV-positive angiocentric T-cell lymphoma favorably involving the nasal cavity and nasopharynx.

"Chordoid" Meningioma with Systemic Manifestations of Castleman Syndrome: A case report.: Hwa Sun Lee, Hweon Ok Kim, Do Youn Park, Mee Yeong Sol, Kang Suek Suh, Sun Kyung Lee; Korean J Pathol. 1996;30(3):255-260.

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Abstract PDF: Chordoid meningioma is a recently established meningeal tumor and is characterized by a chordoma like histologic appearance, peritumoral lymphoplasma cell infiltrates causing systemic manifestations similar to Castleman syndrome and having a good prognosis. We experienced a case of chordoid meningioma in a 25 year-old woman. The patient preoperatively manifested iron-resistant hypochromic microcytic anemia, polyclonal gammopathy with beta-gamma bridging and detected a huge mass in the right temporo-parietal convexity of the brain. Microscopically, the mass was composed of nests and cords of cuboid, partly vacuolated cells in a mucoid matrix, simulating chordoma. The tumor was surrounded by masses of lymphoplasma cells around vessels, many of the plasma cells contained Russell bodies. Ultrastructural findings showed intranuclear cytoplasmic invaginations, microvilli protruding from cytoplasmic surfaces and well formed desmosomes. Some portions of tumor cell surface were covered by stretches of basal lamina.

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