Pilomatrix carcinoma: 12-year experience and review of the literature.

Pilomatrix carcinoma is a rare, locally aggressive tumor with a tendency to recur. Distant metastases have been reported, with pulmonary lesions being the most frequent manifestation. Similar to pilomatrixoma, pilomatrix carcinoma typically presents as a nontender, firm dermal swelling and is found most commonly in the head and neck region. Although pilomatrixomas and pilomatrix carcinoma are well-recognized lesions, clinically they are frequently misdiagnosed as other skin conditions. By reviewing the literature over the past 10 years, the aims of this review are to analyze the cause, clinical presentation, histopathologic features, management and outcomes of pilomatrix carcinoma amongst children and adults.