title: Congenital panfollicular nevus: report of a new entity.
abstract: The various forms of non-melanocytic nevi (hamartomas) are usually encountered in pediatric patients, and nevus sebaceous of Jadassohn is the most common to have undifferentiated pilosebaceous units. We report a unique congenital follicular nevus that fails to meet the criteria of any previously described follicular neoplasm, despite the plethora of alternatives. Clinically considered a syringocystadenoma papilliferum, the excised lesion contained multiple dermal nodules that exhibited nearly all stages of follicular differentiation. The periodicity of the follicular proliferations was akin to normal terminal hair, and a prominent perifollicular sheath surrounded each. This benign lesion of abortive hair follicles was unassociated with any established genodermatous syndrome or other adnexal neoplasm.
authors.affiliation: The Department of Pathology at The University of Washington, Seattle, WA 98105, USA. lfinn@chmc.org
authors.forename: Laura S
authors.initials: LS
authors.lastname: Finn
authors.forename: Zsolt B
authors.initials: ZB
authors.lastname: Argenyi
mesh_terms: D006201:Hair Diseases / Q000151:congenital* / Q000473:pathology / Q000601:surgery; D006222:Hamartoma / Q000151:congenital* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007223:Infant; D008297:Male; D009506:Nevus / Q000151:congenital* / Q000473:pathology / Q000601:surgery; D012878:Skin Neoplasms / Q000151:congenital* / Q000473:pathology / Q000601:surgery; D016896:Treatment Outcome