Pilomatricoma: Case Report

is a benign, usually asymptomatic tumor arising from hair follicular matrix cells. It is usually a solitary lesion and is most commonly found on the face and upper extremities, appearing as a firm, dermal nodule covered by the normal skin. Although the tumor can occur in patients of any age, about 60% of pilomatricomas are found in those aged less than twenty (1, 2). Most cases involve a single nodule, but multiplicity has been observed (3). Diagnosis is usually based on palpation of a superficial, hard mass and confirmed by histopathologic examination. The authors believe, however, that the ultrasonographic findings of pilomatricoma facilitate accurate diagnosis, and if a calcified soft tissue mass is seen at ultrasonography, pilomatricoma should be included in the differential diagnosis. Case Report