title: Extensive pili multigemini over the back.
abstract: Pili multigemini is a rare disorder where more than one hair exists in a single hair follicle. Papillar tips that divide into several tips will produce several hair shafts, so that characteristically do not fuse again. This disorder is relatively frequent on the beard of adult men and on the scalp of children. However, extensive areas of pili multigemini in other locations have rarely been described.
authors.affiliation: Department of Dermatology, Hospital General Universitario Gregorio Marañón, Madrid, Spain ; Department of Dermatology, Hospital La Zarzuela, Madrid, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Ciudad-Blanco
authors.affiliation: Department of Dermatology, Hospital Infanta Leonor, Madrid, Spain.
authors.forename: Elena Conde
authors.initials: EC
authors.lastname: Montero
authors.affiliation: Department of Pathology, Hospital La Zarzuela, Madrid, Spain.
authors.forename: José Antonio Jiménez
authors.initials: JA
authors.lastname: Heffernan
authors.affiliation: Department of Dermatology, Hospital La Zarzuela, Madrid, Spain.
authors.forename: Pablo Lázaro
authors.initials: PL
authors.lastname: Ochaita
keywords: Hair shaft dysplasia; pili multigemini; trichoscopy