Pilomatricomas are benign calcifying neoplasms derived from follicle matrix cells. They are more common in children than adults (1–3). Pilomatricomas are often misdiagnosed as other benign cysts or neoplasms (1,4). Although they present most commonly in the head and neck region, approximately 15% occur on the upper extremities (2). Pilomatricomas are not typically painful, although one-third of patients may note tenderness (2).

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