Journal of Pathology and Translational Medicine

Original Articles

PLAG1, SOX10, and Myb Expression in Benign and Malignant Salivary Gland Neoplasms: Ji Hyun Lee, Hye Ju Kang, Chong Woo Yoo, Weon Seo Park, Jun Sun Ryu, Yuh-Seog Jung, Sung Weon Choi, Joo Yong Park, Nayoung Han; J Pathol Transl Med. 2019;53(1):23-30. Published online November 14, 2018; DOI: https://doi.org/10.4132/jptm.2018.10.12

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Background
Recent findings in molecular pathology suggest that genetic translocation and/oroverexpression of oncoproteins is important in salivary gland tumorigenesis and diagnosis. Weinvestigated PLAG1, SOX10, and Myb protein expression in various salivary gland neoplasm tissues.
Methods
A total of 113 cases of surgically resected salivary gland neoplasms at the NationalCancer Center from January 2007 to March 2017 were identified. Immunohistochemical stainingof PLAG1, SOX10, and Myb in tissue samples was performed using tissue microarrays.
Results
Among the 113 cases, 82 (72.6%) were benign and 31 (27.4%) were malignant. PLAG1 showednuclear staining and normal parotid gland was not stained. Among 48 cases of pleomorphicadenoma, 29 (60.4%) were positive for PLAG1. All other benign and malignant salivary glandneoplasms were PLAG1-negative. SOX10 showed nuclear staining. In normal salivary gland tissuesSOX10 was expressed in cells of acinus and intercalated ducts. In benign tumors, SOX10 expressionwas observed in all pleomorphic adenoma (48/48), and basal cell adenoma (3/3), but not inother benign tumors. SOX10 positivity was observed in nine of 31 (29.0%) malignant tumors.Myb showed nuclear staining but was not detected in normal parotid glands. Four of 31 (12.9%)malignant tumors showed Myb positivity: three adenoid cystic carcinomas (AdCC) and onemyoepithelial carcinoma with focal AdCC-like histology.
Conclusions
PLAG1 expression is specificto pleomorphic adenoma. SOX10 expression is helpful to rule out excretory duct origin tumor,but its diagnostic value is relatively low. Myb is useful for diagnosing AdCC when histology isunclear in the surgical specimen.

Citations

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Percutaneous fine needle aspiration cytology of thymoma.: Weon Seo Park, In Ae Park, Sang Kook Lee, Eui Keun Ham; Korean J Cytopathol. 1993;4(1):16-24.

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Abstract PDF: No abstract available.

Cytopathology of Metastatic Mucoepidermoid Carcioma of the Lung.: Weon Seo Park, Eui Keun Ham; Korean J Cytopathol. 1994;5(2):180-183.

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Abstract PDF: A case of metastatic mucoepidermoid carcinoma of the lung, originating from the hard palate, was diagnosed by sputum and bronchial washing cytology. Although the cytologic features of mucoepidermoid carcinoma have been well described, it is easy to confuse mucoepidermoid carcinoma with the more common primary adenocarcinoma or squamous cell carcinoma of the lung. The features distinguishing mucoepidermoid carcinoma from other primary neoplasms includ 1) mucus-secreting cells individually and in clusters admixed with other cell components, 2) epidermoid cells identified by the presence of abundant spread-out cytoplasm and an oval dark nucleus and 3) intermediate cells resembiling normal ductal epithelial cells with moderate-toscanty cytoplasm, a central, round vesicular nucleus and a prominent nucleolus, The morphologic features of metastatic mucoepidermoid carcinoma in the case were similar to those of primary sallvary mucoepidermoid carcinoma.

Case Report

Mucinous Tubular and Spindle Cell Carcinoma of Kidney Occurring in a Patient with Pulmonary Adenocarcinoma.: Seog Yun Park, Gyeong Hoon Kang, Jae Y Ro, Jennifer Black, Jinsoo Chung, Kang Hyun Lee, Eun Kyung Hong, Weon Seo Park; Korean J Pathol. 2008;42(1):54-59.

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Abstract PDF: Mucinous tubular and spindle cell carcinoma (MTSCC) is a rare type of kidney tumor that has only been recently described. Furthermore, a case of MTSCC associated with a simultaneous lung cancer in the same patient has never been reported in the literature. In this paper, we describe a kidney tumor that was detected during staging work-up in a 72-year-old lung cancer patient. The kidney tumor was removed and shown to exhibit histological and immunophenotypic features of MTSCC, completely distinct from the pulmonary adenocarcinoma. In addition, this case was unique because it was characterized by neuroendocrine differentiation as well as p53 and Ki-67 overexpression in tumor cells. Therefore, we report a case of MTSCC diagnosed in a patient with pulmonary adenocarcinoma and describe the detailed histologic and immunohistochemical features of MTSCC.

Original Articles

Pathologic Features of Korean Prostate Adenocarcinoma: Mapping Analysis of 83 Cases.: You Jeong Lee, Dong Il Kim, Hee Eun Lee, Jae Kyung Won, Eun Kyung Hong, Geon Kook Lee, Kang Hyun Lee, Weon Seo Park; Korean J Pathol. 2006;40(3):204-209.

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Abstract PDF: BACKGROUND
:Prostatic adenocarcinoma makes up about 2% of the total cancer incidence and cancer death in Korean men, but the incidence of this malady is continuously increasing. So far, there have been only a few studies describing the pathologic characteristics of the prostatic adenocarcinoma in Korean patients. In this study, we analyzed 83 radical prostatectomy specimens by using mapping analysis to discover the clinico pathologic characteristics of Korean prostatic adenocarcinoma.
METHODS
The resected prostates were serially sectioned and embedded for histologic mapping. The clinico pathologic findings, including the Gleason score, tumor size, prostate intraepithelial neoplasia (PIN) and tumor invasion to the surrounding tissues, were examined.
RESULTS
The mean values were as follows: age, 64.1+/-6.6 years; serum prostate specific antigen (sPSA), 16.6+/-16.2 ng/mL; tumor volume, 22.3+/-22.4%; tumor size, 2.2+/-1.2 cm; and Gleason score, 6.9+/-0.9. The rate of high grade PIN was 79.7%. The Gleason score, tumor extent and T stage were statistically correlated (p<0.05).
CONCLUSIONS
Some prognostic factors such as sPSA and the Gleason scores showed significantly lower levels compared with those of the previous studies on Korean prostate adenocarcinoma (16-36 ng/mL vs 16.6 ng/mL and 7.3-7.7 vs 6.9, respectively). Although these values are still higher than those of the western studies, this study implies that the early detection of prostate adenocarcinoma is increasing in Korea.

Expression of CD43 in Colorectal Adenocarcinom.: Kyeong Cheon Jung, Youngmee Bae, Hyekyung Ahn, Hye Eun Kim, Myung Chul Jang, Hye Rin Roh, Gi Bong Chae, Won Jin Choi, Woo Jin Kim, Weon Seo Park; Korean J Pathol. 2004;38(1):8-14.

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Abstract PDF: BACKGROUND
CD43 is a sialoglycoprotein that is highly expressed on most leukocytes, except on B lymphocytes and dendritic cells. CD43 has been reported to be involved in the adhesion and apoptosis of lymphocytes. Although the aberrant expression of CD43 antigen in non-lymphoid tissues has been reported, the expression of the CD43 antigen in gastrointestinal malignancies is not well studied. Here, we studied the expression of CD43 in colon adenocarcinoma using the anti-CD43 monoclonal antibody developed in our laboratory.
METHODS
Thirty patients who had undergone surgical resection for colorectal carcinoma were recruited. The expression of CD43 molecule was determined by analyzing the formalin-fixed, paraffin-embedded specimens immunohistochemically using our newly developed anti-CD43 mAb (K06). The results obtained by the immunohistochemical analysis correlated to the clinicopatho-logical parameters.
RESULTS
The expression of CD43 were found in 20 out of 30 colorectal carcinoma cases. The expression of CD43 antigen is higher in well differentiated adenocarcinomas than poorly or moderately differentiated adenocarcinomas.
CONCLUSIONS
The new anti-CD43 mAb might be helpful for the detection of the expression of CD43 on colorectal carcinoma cells. Further studies are required to assess the relationship between the CD43 expression and the colorectal carcinogenesis.

Case Reports

Parapelvic Renal Cyst (Pericalyceal Lymphangiectasis): A case report.: Weon Seo Park, Je Geun Chi; Korean J Pathol. 1994;28(2):210-212.

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Abstract PDF: Parapelvic renal cyst, also designated as pericalyceal lymphangiectasis, is an unusual lesion that is usually brought to light during surgery for ureteropelvic junction obstruction or recurrent pyelonephritis. Grossly, the renal pelvis is enveloped by a multilocular cystic mass filled with clear fluid. This lesion is confined to the peripelvic tissues and does not extend into the parenchyma, which, however, may show the effects of hydronephrosis or pyelonephritis. A 50-year-old man presented with hydronephrosis. An ultrasonography revealed hydronephro-sis of the left kidney. Intravenous pyelography and DMSA ("Tc-Dimercaptosuccinic acid) scan showed nonfunctioning kidney of the same side. Simple left nephrectomy was done. The renal pelvis was mildly dilated and a cyst was found buldging into the renal pelvis. The content was watery clear and the cyst was not connected to the renal pelvis or calyces. The cyst was round unilocular and lined by attenuated single layer of endothelial cells. The endothelial cells showed no reactivity to factor-VIII related antigen. With these findings, we concluded that this cystic lesion is basically lymphatic cyst and hydronephrosis was caused by the compression of pelvic out-flow of the kidney.

Squamous Metaplasia in Tubular Adenoma of Sigmoid Colon: A case report.: Soo Min Kang, Weon Seo Park, Woo Ho Kim, Yong Il Kim; Korean J Pathol. 1993;27(6):663-665.

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Abstract PDF: The occurrence of squamous metaplasia(morule) in colorectal mucosa and adenocarcinoma, althrough rare, has been well documented. In contrast, very little mention has been given to mature squamous cells seen in colorectal polyps or adenomas. A 42-year-old woman presented with a 2-month history of diarrhea and melena. Proctosigmoidoscopy revealed a 4 cm-sized polypoid tumor 20 cm above the anal verge. Colonoscopic biopsy showed tubular adenoma, and a segmental resection of sigmoid colon was done. Microscopically, the tumor was c classical tubular adenoma containing multiple solid nests of squamous cells scattered only in the neoplasm; the squamous nests were generally small, and some showed direct continuity with adenomatous glands. The squamous cells were keratinizing and had regular nuclei with no mitotic activity. The importance of this phenomenon lies in its pathologic recognition, and the findings suggest that awareness of this rare occurrence in colorectal polyps should avert such overdiagnosis, and consequently prevents unnecessary radical surgery.

Intestinal Spargnanosis Presenting as an Inflammatory Mass: A case report.: Weon Seo Park, Seung Sook Lee, Yong Il Kim, Seon Hee Kim; Korean J Pathol. 1992;26(4):414-416.

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Abstract PDF: A 39-year-old male patient presented with chronic abdominal pain and intermittent diarrhea for 8 months. Colon study showed an annular stricture at the ileocecal value. He underwent ileocecectomy with clinica impression of intestinal tuberculosis. The resected intestinal wall along the lieocecal junction demonstrated a localized, annular constriction and intramural nodular inflammatory growth in which were clusters of multiple microabscesses as well as acute and chronic inflammatory cell infiltration including eosinophils and fibrosis. Encountered were a few resolving phase of parasitic granulomatous tunnels in which fragments of degenerated sparganum with foreign body reaction were found in one focus. He had history of ingesting uncooked frogs 2 years ago. The above case suggests that differential diagnosis of inflammatory tumorous lesions in the intestine should include sparganosis in Korea.

Original Articles

Thymoma: A clinicopathologic analysis of 66 cases.: Weon Seo Park, Seong Hoe Park, Yong Il Kim; Korean J Pathol. 1992;26(4):372-380.

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Abstract PDF: A total of 66 cases of thymoma(57 surgically resected cases and 9 incisional biopsy cases) were reviewed with an attempt to correlate pathomorphologic features and clinical presentations. Criteria of benign or invasive thymoma were primarily determined by operative clinical and pathologic findings. Of them, 21 cases were invasive thymomas. The mean age of patients at the time of surgery was 47 years and it occurred largely in the sixth decade. Myasthenia gravis was accompanied in 29 cases(43%). One patient died during folow-up period, and five of the remainder suffered from recurrence. Microscopically, mixed type was the most common one(33 cases), being followed by predominantly epithelial type(17 cases) and predominantly lymphocytic type(16 cases). Thirty four cases of thymomas were cortical type, 29 mixed type, and the remaining 3 medullary type. None of the histologic type were significantly correlated with tumor invasiveness, Myasthenia gravis was more frequently associated with mixed and cortical type, respectively.

Ovarian mature cystic teratoma with histologic features of chronic thyroiditis: Histologic analysis of 4 cases.: Doo Hyun Chung, Weon Seo Park, Soo Min Kang, Eun Sil Yu, Seong Hoe Park; Korean J Pathol. 1992;26(3):209-214.

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Abstract PDF: We have reviewed ovarian mature cystic teratomas with features of chronic thyroiditis that were diagnosed at the department of pathology, Seoul National University Hospital during 7 years, 1984-1991. Twenty three case(8%) containing thyroid tissue among 285 ovarian mature teratomas were available for histopathologic examination. Among these, 4 cases(1.4%) showed lymphocytic infiltration with lymphoid follicle formation. These four cases were examined according to the strict histologic criteria of autoimmune thyroiditis and reactive non-autoimmune thyroiditis for the purpose of differentiation of pathogenesis. Two cases were similar to autoimmune in nature and the other two cases simply seemed to reflect reactive features to adjacent stimulating elements. In conclusion, thyroid tissue present in ovarian cystic teratoma may have histologic features of chronic thyroiditis of either autoimmune or non-autoimmune origin.

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