Giant gluteal pilomatrixoma: An uncommon tumor in a rare localization

Abstract

Pilomatrixoma is an uncommon, benign subcutaneous tumor arising from the hair follicle matrix. This tumor occurs more commonly in children than in adults, and most often originates on the head, neck or upper extremities. Gluteal region is an extremely rare site of pilomatrixoma. Multiple presentation is an unusual condition and often associated with some familial syndromes such as myotonic dystrophy, Gardner syndrome and Turner syndrome. Pilomatrixoma mostly presents as a painless, firm, slow-growing subcutaneous mass, and is usually encapsulated by connective tissue and sharply demarcated from the surrounding normal tissue. Both clinical and radiological findings are non-specific, and therefore histopathology is necessary to reach correct diagnosis. These lesions have very low risk of malignant transformation, and surgical excision with adequate margins is the treatment of choice. Herein, a rare case of gluteal pilomatrixoma with multiple presentation in the upper extremities in a young female patient was presented.