Proliferating trichilemmal cyst

Abstract

Proliferating trichilemmal cyst is an infrequent entity. It develops in the scalp of old women as a slow-growing tumoral lesion. In some cases, it evolves into a malignant transformation (malignant proliferating trichilemmal cyst). This paper reports the case of a woman with a large scalp lesion whose histopathological diagnosis is proliferating trichilemmal cyst.