Korean J Dermatol.  2022 Dec;60(10):697-700.

A Case of Generalized Cutaneous Piloleiomyomatosis

• Jeong EH
• Yim JE
• Kwon HM
• Kim HR
• Bae YK
• Choi JS
• Shin DH

Abstract

Piloleiomyoma originates from the arrector pili muscles. Multiple piloleiomyoma lesions may occur, especially on the trunk and extremities. However, multiple lesions throughout the body are rare. We present a case of generalized cutaneous piloleiomyomatosis in a 72-year-old man who had numerous lesions throughout his body. Clinically, the patient presented with fixed and non-tender reddish to brownish papules and nodules mainly on the back and extensors of extremities. Punch biopsy was performed, and the specimen was stained with hematoxylin and eosin, revealing interweaving fascicles of cigar-like spindle cells on the upper dermis. On immunohistochemical staining, tumor cells were positive for smooth muscle actin. Based on these features, we diagnosed the patient with generalized cutaneous piloleiomyomatosis.

Keyword

Hair follicle; Leiomyoma; Smooth muscle cell tumor