Proliferating epithelial cysts have historically been divided into two subtypes: proliferating trichilemmal cysts and proliferating epidermoid cysts. 8 Proliferating trichilemmal cysts are found more often on the scalps of females and are generally well circumscribed subepidermal lesions with uniform histologic patterns with varying degrees of cytologic atypia. They display low rates of recurrence. This is in con-Given the risk of carcinomatous change, surgical recommendations are complete surgical excision with negative surgical margins.
ORCID
Patricia M. Richey
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