Clinical features

•Rare variant of epidermoid cyst associated with HPV infection

•Mostly adults and the face is most often affected followed by trunk & arms

•Should be distinguished from HPV-associated epidermoid cyst which presents on the soles  with a predilection for the Japanese

Histological features

•Infundibular cyst lined by acanthotic squamous epithelium showing marked hypergranulosis, hyperkeratosis & parakeratosis

•Conspicuous, enlarged keratohyalin granules

•Koilocytosis

•Squamous eddies are often a prominent feature

•Exceptionally dendritic melanocytes and sebaceous cells have been documented (Hardin et al (2013)

•Exceptionally, may show features of a pilar cyst