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Dermatology Research and Practice
Volume 2010, Article ID 192371, 4 pages
http://dx.doi.org/10.1155/2010/192371
Case Report

Dermoscopic Features of Eccrine Porocarcinoma Arising from Hidroacanthoma Simplex

1Department of Dermatology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishi-Ogu, Arakawa-ku, Tokyo 116-8567, Japan
2Department of Dermatology, Hiratsuka City Hospital, 1-19-1, Minamihara, Hiratsuka city, Kanagawa 254-0065, Japan

Received 12 May 2010; Revised 19 August 2010; Accepted 8 September 2010

Academic Editor: Iris Zalaudek

Copyright © 2010 Reiko Suzaki et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Eccrine porocarcinoma is a rare cutaneous neoplasm that mainly affects elderly people and grows slowly over a long period of time but often experiences an accelerated growth phase. Eccrine porocarcinoma may arise de novo or evolve from a pre-existing benign eccrine poroma. We reported a 86-year-old Japanese woman presenting with two reddish-colored pendulated lesions on a keratotic light brown plaque on the right thigh. Dermoscopic examination of the light-brown plaque demonstrated many whitish globular structures in a light-brown background. At the two reddish-colored pendulated lesions, polymorphous and prominent vessel proliferation was observed together with irregularly shaped whitish negative network. Immunohistochemical study demonstrated a positive CEA staining at ductal structures and atypical clear cells of reddish nodules. A diagnosis of eccrine porocarcinoma arising in a pigmented hidroacanthoma simplex was eventually established, and the dermoscopic features of eccrine porocarcinoma from hidroacanthoma simplex was described for the first time.