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Case Reports in Dermatological Medicine
Volume 2013, Article ID 469516, 3 pages
Case Report

A Case of an Undifferentiated Squamous Cell Carcinoma Arising from an Epidermal Cyst

1Department of Dermatology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawara-cho, Sakyo, Kyoto 606-8507, Japan
2Department of Dermatology, Takatsuki Red Cross Hospital, 1-1-1 Abuno, Takatsuki 569-1096, Japan

Received 1 November 2012; Accepted 13 December 2012

Academic Editors: X.-H. Gao and M. Nikolic

Copyright © 2013 Mai Tokunaga 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.


An epidermal cyst is a common benign subcutaneous tumor and rarely develops malignancy. We report a case of an undifferentiated cutaneous squamous cell carcinoma (SCC) that arose from an epidermal cyst on the left side of the neck. The epidermal cyst had rapidly increased in size and presented cauliflower-like tumor. Histological study revealed undifferentiated squamous cell carcinoma that was arising from the epidermal cyst.