title: Eruptive vellus hair cysts.
abstract: Eruptive vellus hair cyst (EVHC), described initially in 1977, is a benign dermatologic condition that is characterized by the sudden appearance of monomorphic, follicular, asymptomatic, small papules in children and young adults. The diagnosis is based on the histopathologic findings of stratified-squamous epithelium with a granular layer that surrounds a cystic space filled with laminated keratin and a variable number of vellus hair cysts. EVHC can be associated with steatocystoma multiplex. A current hypothesis suggests that EVHC originates from a cystic change at the insertion of the pilosebaceous duct. EVHC is primarily treated for cosmesis with retinoids, surgery, and lasers.
authors.affiliation: The Ronald O. Perelman Department of Dermatology, New York University School of Medicine, USA.
authors.forename: Utpal
authors.initials: U
authors.lastname: Patel
authors.forename: Vitaly
authors.initials: V
authors.lastname: Terushkin
authors.forename: Max
authors.initials: M
authors.lastname: Fischer
authors.forename: Hideko
authors.initials: H
authors.lastname: Kamino
authors.forename: Rishi
authors.initials: R
authors.lastname: Patel
mesh_terms: D058070:Asymptomatic Diseases; D004814:Epidermal Cyst / Q000473:pathology*; D005260:Female; D006201:Hair Diseases / Q000473:pathology*; D006801:Humans; D055815:Young Adult