Skip Navigation LinksHome > August 2011 - Volume 33 - Issue 6 > Cutaneous Mixed Tumor, Eccrine Variant: A Clinicopathologic...
American Journal of Dermatopathology:
doi: 10.1097/DAD.0b013e318206c1a3
Original Study

Cutaneous Mixed Tumor, Eccrine Variant: A Clinicopathologic and Immunohistochemical Study of 50 Cases, With Emphasis on Unusual Histopathologic Features

Kazakov, Dmitry V MD, PhD*†; Kacerovska, Denisa MD, PhD*†; Hantschke, Markus MD‡; Zelger, Bernhard MD, MSc§; Kutzner, Heinz MD‡; Requena, Luis MD¶; Grayson, Wayne MBChB, PhD, FCPath‖; Bisceglia, Michele MD**; Schaller, Jörg MD††; Kempf, Werner MD‡‡; Denisjuk, Natalia MD‡‡; Michal, Michal MD*†

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Abstract

Mixed tumor, eccrine type, is a rare cutaneous adnexal neoplasm, mostly reported as isolated case reports. A systematic analysis of its histopathologic and immunohistochemical features has not previously been performed on a large series. The purpose of our investigation was to study a large number of cutaneous eccrine mixed tumors so as to fully characterize the entire spectrum of changes in the epithelial and stromal components, with an emphasis on unusual histopathologic features that may represent a diagnostic pitfall. This article reports a light microscopic and immunohistochemical study of 50 cases of eccrine mixed tumor, complemented by a literature review. Our study identified some unusual histopathologic features, thus extending the morphologic spectrum of this neoplasm. These included prominent cribriform areas, clear cell change, pseudorosette structures, prominent osseous metaplasia, and physaliphorous-like cells. Most of these features have not been previously recorded in eccrine mixed tumors and may represent a potential diagnostic pitfall.

© 2011 Lippincott Williams & Wilkins, Inc.

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