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Clear cell renal cell carcinoma with Paneth-like cells: Clinicopathologic, morphologic, immunohistochemical, ultrastructural, and molecular analysis of 13 cases

F. Kojima, S. Bulimbasic, R. Alaghehbandan, P. Martinek, T. Vanecek, K. Michalova, K. Pivovarcikova, M. Michal, M. Hora, SI. Murata, E. Sugawara, J. Rogala, R. Limani, O. Hes,

. 2019 ; 41 (-) : 96-101. [pub] 20190603

Language English Country United States

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc20006255

Clear cell renal cell carcinoma (CRCC) is well known for its intratumoral heterogeneity. Paneth-like cells (PLC) have been reported in variable organs (i.e., hepatobiliary, genitourinary, and female genital tract). In genitourinary system, it is possible to find PLCs in epididymis, urinary bladder and prostate. The objective of this study was to assess PLC in CRCCs 13 CRCCs with prominent PLC (CRCCPLC) were selected out of 1378 CRCCs in our registry. The tumors were analyzed using morphologic, immunohistochemical, ultrastructural, and molecular genetic methods. CRCCPLCs were mostly of low histologic grade (12/13). Immunohistochemical profile was compatible with classic CRCC. PLC constituted 10 to-70% of the tumor volume (mean 17.7%, median 10%). PLCs did not express neuroendocrine markers (chromogranin, synaptophysin, CD56, INSM-1). Ultrastructurally, PLCs were filled by membrane bounded vesicles of various sizes and were compatible with secretory type of cells. VHL mutation was found in 9/9 cases, and LOH3p was found in 6/8 analyzable cases. Conclusions: PLC morphology can variably be present in "classic" CRCC, even in a substantial proportion. Ultrastructurally, PLCs have all attributes of secretory cells. Preliminary follow up data showed that these tumors may not be associated with aggressive clinical behavior.

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$a Clear cell renal cell carcinoma (CRCC) is well known for its intratumoral heterogeneity. Paneth-like cells (PLC) have been reported in variable organs (i.e., hepatobiliary, genitourinary, and female genital tract). In genitourinary system, it is possible to find PLCs in epididymis, urinary bladder and prostate. The objective of this study was to assess PLC in CRCCs 13 CRCCs with prominent PLC (CRCCPLC) were selected out of 1378 CRCCs in our registry. The tumors were analyzed using morphologic, immunohistochemical, ultrastructural, and molecular genetic methods. CRCCPLCs were mostly of low histologic grade (12/13). Immunohistochemical profile was compatible with classic CRCC. PLC constituted 10 to-70% of the tumor volume (mean 17.7%, median 10%). PLCs did not express neuroendocrine markers (chromogranin, synaptophysin, CD56, INSM-1). Ultrastructurally, PLCs were filled by membrane bounded vesicles of various sizes and were compatible with secretory type of cells. VHL mutation was found in 9/9 cases, and LOH3p was found in 6/8 analyzable cases. Conclusions: PLC morphology can variably be present in "classic" CRCC, even in a substantial proportion. Ultrastructurally, PLCs have all attributes of secretory cells. Preliminary follow up data showed that these tumors may not be associated with aggressive clinical behavior.
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$a Bulimbasic, Stela $u Clinical Department of Pathology and Cytology, University Hospital Centre Zagreb, Croatia.
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$a Alaghehbandan, Reza $u Department of Pathology, Faculty of Medicine, University of British Columbia, Royal Columbian Hospital, Vancouver, BC, Canada.
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$a Martinek, Petr $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Vanecek, Tomas $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Michalova, Kvetoslava $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Pivovarcikova, Kristyna $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Michal, Michal $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Hora, Milan $u Department of Urology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Murata, Shin-Ichi $u Department of Human Pathology, Wakayama Medical University, Wakayama, Japan.
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$a Sugawara, Emiko $u Department of Pathology, Musashino Red Cross Hospital, Tokyo, Japan.
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$a Rogala, Joanna $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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$a Limani, Rinë $u Institute of Pathology, Hospital and University Clinic Services of Kosovo, Prishtina, Kosovo.
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$a Hes, Ondrej $u Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic. Electronic address: hes@medima.cz.
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