Auteur(s) : Jose NEILA IGLESIAS drneils@hotmail.com, Antonio RODRIGUEZ PICHARDO, Begona GARCIA BRAVO, Francisco CAMACHO MARTINEZ Department of Dermatology, Hospital Universitario Virgen Macarena, Av/Dr. Fedriani s/n, 41009 Sevilla, Spain Monilethix was described by Smith in 1879 as an autosomal dominant human hair dysplasia [1]. It is a rare defect caused by mutations of the hair keratins (Hb1, Hb3 and Hb6). These mutations lead to a thinning of the hair shaft in a rhythmic node-internode pattern [...]