Giant pilomatricoma of the arm: An unusual presentation (A case report)

Giant Sternal Pilomatricoma: An Unusual Tumor at an Uncommon Site

“…Hence, the differential diagnosis of sebaceous cyst, dermoid cyst, retention cyst, abscess, benign vascular tumors, and adnexal tumors trichoepithelioma, trichoblastoma, basal cell carcinoma and trichoblastic carcinoma should considered. [1][2][3][4][5] Secondary features such as inflammation and soft tissue changes in a pilomatricoma mimic many mentioned lesions. Hence an imaging workup is useful with unusual presentations.…”

“…Pilomatricoma is an unusual skin adnexal tumor that arises from a hair matrix derived from the epidermal primitive basal cells, first described in 1880 by Malherbe and Chenantais. 1 They manifest as small, firm asymptomatic nodular masses with a good prognosis. It occurs in the head (periauricular, periorbital, frontal, and temporal) and neck region.…”

“…2,3 But some unusual locations have also been documented in the literature: arm, upper back, cymba conchae(ear), thigh, breast, sternum, and lower leg. [1][2][3][4][5] Usual lesions are less than 3 cm in size. According to the literature, pilomatricoma with the most significant size documented was 34 Â 21 cm.…”

What is masquerading as a cyst

“…[ 2 ] Calcification of the tumor was observed in 80% of cases, sometimes achieving a true osteoma. [ 4 ]…”

Multiple malherbe’s calcifying epithelioma: A case report

“…Involvement of the upper extremities is relatively uncommon. 2,3 We report a case of an unusual presentation of multiple pilomatricomas in the arm of a 13-year-old girl.…”