title: Trichilemmal cyst nevus: a new complex organoid epidermal nevus.
abstract: A 31-year-old woman had an organoid nevus characterized by multiple trichilemmal cysts arranged in a bandlike pattern. The involved streaks followed Blaschko's lines and were covered, in addition, by multiple filiform hyperkeratoses and comedo-like plugs. Some histopathologic features of this complex nevus were reminiscent of those of well-established organoid nevi such as nevus comedonicus, porokeratotic eccrine nevus, or hair follicle nevus, but the presence of multiple large trichilemmal cysts was a conspicuously distinctive abnormality. Consequently, we propose for this new organoid nevus the names "trichilemmal cyst nevus" or "nevus trichilemmocysticus."
authors.affiliation: Department of Dermatology, University of Cologne, Cologne, Germany.
authors.forename: Iliana
authors.initials: I
authors.lastname: Tantcheva-Poor
authors.forename: Katja
authors.initials: K
authors.lastname: Reinhold
authors.forename: Thomas
authors.initials: T
authors.lastname: Krieg
authors.forename: Rudolf
authors.initials: R
authors.lastname: Happle
mesh_terms: D000328:Adult; D004814:Epidermal Cyst / Q000473:pathology* / Q000601:surgery; D004817:Epidermis / Q000473:pathology / Q000601:surgery; D005153:Facial Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D009506:Nevus / Q000473:pathology* / Q000601:surgery; D012782:Shoulder; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery; D013848:Thigh