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Case Reports in Dermatological Medicine
Volume 2012, Article ID 257405, 3 pages
http://dx.doi.org/10.1155/2012/257405
Case Report

Pilomatrixoma of the Arm: A Rare Case with Cytologic Diagnosis

1Department of Pathology, Chacha Nehru Bal Chikitsalaya, Maulana Azad Medical College, Geeta Colony, Delhi 110031, India
2Department of Pediatric Surgery, Chacha Nehru Bal Chikitsalaya, Maulana Azad Medical College, Geeta Colony, Delhi 110031, India

Received 13 August 2012; Accepted 9 September 2012

Academic Editors: H. Dobrev and I. Kurokawa

Copyright © 2012 Ruchika Gupta 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

Pilomatrixoma, a benign skin appendageal tumor, is seen commonly in head and neck. Occurrence of pilomatrixoma in the upper extremities is not common and has been reported infrequently in the available literature. Only a few cases with preoperative aspiration cytology have been reported in the literature. A five-year-old girl underwent fine needle aspiration (FNA) of a firm subcutaneous nodule on the lateral aspect of left arm. FNA smears showed scattered and few fragments of round to oval cells along with multinucleated giant cells. Few shadow cells were seen. A cytologic impression of pilomatrixoma was rendered, which was confirmed on histopathology. Pilomatrixoma, a common skin appendageal tumor in head and neck region, should be considered in the cytologic differential diagnoses of subcutaneous masses even in unusual locations like arm. The varied cytomorphology should be remembered to avoid misdiagnosis.