title: Hereditary hypotrichosis simplex of the scalp.
abstract: Hereditary hypotrichosis simplex of the scalp is a genetic disorder, characterized by sparse or absent scalp hair without structural defects, in the absence of other ectodermal or systemic abnormalities. Structural hair defects may be presented with a genetic disorder affecting hair growth or part of a congenital syndrome or may indicate underlying metabolic disorders, or may be associated with other diseases. We describe a 26-years-old Persian girl suffering from hypotrichosis simplex of the scalp with trichorrhexis nodosa who had no ectodermal defects and systemic disease.
authors.affiliation: Department of Dermatology, Skin Research Center, Shahid Beheshti University of Medical Sciences, Shohada-e Tajrish Hospital, Tehran, Iran.
authors.forename: Hamideh
authors.initials: H
authors.lastname: Moravvej-Farshi
authors.affiliation: Department of Dermatology, Skin Research Center, Shahid Beheshti University of Medical Sciences, Shohada-e Tajrish Hospital, Tehran, Iran.
authors.forename: Azin
authors.initials: A
authors.lastname: Ayatollahi
authors.affiliation: Department of Dermatology, Skin Research Center, Shahid Beheshti University of Medical Sciences, Shohada-e Tajrish Hospital, Tehran, Iran.
authors.forename: Somayeh
authors.initials: S
authors.lastname: Hejazi
keywords: Genetic disorder; hypothricosis simplex; trichorrhexis nodosa