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Renal cell neoplasms of oncocytosis have distinct morphologic, immunohistochemical, and cytogenetic profiles

Gobbo, Stefano and Eble, John N. and Delahunt, Brett and Grignon, David J. and Samaratunga, Hemamali and Martignoni, Guido and Zhang, Shaobo and Wang, Mingsheng and Brunelli, Matteo and Cossu Rocca, Paolo Alessandro and Cheng, Liang (2010) Renal cell neoplasms of oncocytosis have distinct morphologic, immunohistochemical, and cytogenetic profiles. The American Journal of Surgical Pathology, Vol. 34 (5), p. 620-626. ISSN 0147-5185. eISSN 1532-0979. Article.

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DOI: 10.1097/PAS.0b013e3181d73293

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Abstract

This study was undertaken to elucidate the genetic patterns of the renal cell neoplasms of oncocytosis and to compare them with those found in cases with multiple oncocytomas. Three cases of renal oncocytosis and 6 cases of multiple oncocytomas were analyzed. Fluorescence in situ hybridization analysis was performed with centromeric probes for chromosomes 1, 2, 6, 10, and 17 that are typically lost in chromophobe renal cell carcinoma but not in oncocytoma. Immunohistochemistry for cytokeratin 7, parvalbumin, and S100A1 was performed in all cases. Eleven tumors were present in the 3 kidneys with oncocytosis. One of these was a classic chromophobe renal cell carcinoma. In the other 10, none showed any chromosomal losses, whereas 3 showed gains of all 5 chromosomes and 1 had gains of chromosomes 2 and 10. The chromophobe renal cell carcinoma showed losses of chromosome 1, 6, 10, and 17. Twelve of 14 tumors from the patients with multiple oncocytomas showed no loss of any of the chromosomes 1, 2, 6, 10, or 17 and 2 had loss of chromosome 1. All the tumors from kidneys with renal oncocytosis showed strong parvalbumin immunoreactivity, whereas cytokeratin 7 and S100A1 expression were variable. In summary, the renal cell neoplasms of oncocytosis seem to have distinct morphologic, immunohistochemical, and cytogenetic profiles and likely are a distinct entity, not closely related to oncocytoma or chromophobe renal cell carcinoma.

Item Type:Article
ID Code:6425
Status:Published
Refereed:Yes
Uncontrolled Keywords:Kidney, neoplasia, oncocytoma, chromophobe, oncocytosis, hybrid, immunohistochemistry, cytogenetic, fluorescence in situ hybridization, X-chromosome inactivation
Subjects:Area 06 - Scienze mediche > MED/08 Anatomia patologica
Divisions:001 Università di Sassari > 03 Istituti > Anatomia patologica
Publisher:Lippincott Williams & Wilkins
ISSN:0147-5185
eISSN:1532-0979
Copyright Holders:© 2010 Lippincott Williams & Wilkins
Deposited On:30 Aug 2011 12:03

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