| Proliferating trichilemmal cyst | |
|---|---|
| Other names | Proliferating pilar cyst |
 | |
| Proliferating tricholemmal (pilar) 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.