Proliferating trichilemmal cyst
# Proliferating trichilemmal cyst

Proliferating trichilemmal cysts (also known as a "Pilar tumor", "Proliferating follicular cystic neoplasm", "Proliferating pilar tumor", and "Proliferating trichilemmal tumor") are a cutaneous condition characterized by proliferations of squamous cells forming scroll-like $structures.^{:678}$

