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International Journal of Recent Trends in Science and Technology, ISSN 2277-2812 E-ISSN: 2249-8109

Volume 10, Issue 3, April 2014 pp 421-422

Case Report

Pilomatrixoma: A Diagnostic Dilemma on FNAC

Sachan Bhat¹, Pawan Bhat², Sheela Chaudhri³, Deepa Hatwal⁴, Neha Batra⁵

{^1,2,5Assistant Professor, ^3,4Associate Professor, Department of Pathology}

Academic Editor : Dr. Aher K.R.

Pilomatrixoma is a benign skin adnexal tumour commonly seen in the head and neck region and upper extremities of children and young adults. It is under- recognized on cytology, resulting in the over diagnosis of malignancy, and in our case, suspicious of malignancy. We bring forth a case report of a slow growing nodular swelling in a 27-year-old adult male, which was, on fine needle aspiration cytology (FNAC), found to be a suspicious malignant lesion but subsequently, on histopathological examination, found to be pilomatrixoma. Nodular lesions of pilomatrixoma, which are predominantly composed of basaloid cells and pleomorphic cells and devoid of other diagnostic features, lead to a false diagnosis of malignancy. To avoid misdiagnosis, pilomatrixoma should be considered in differential diagnosis when such type of cells are aspirated in slow growing subcutaneous nodules. We discuss here cytomorphological characteristics of pilomatrixoma and its diagnostic dilemma on FNAC.