title: Disorders of hair growth and the pilosebaceous unit: facts and controversies.
abstract: We discuss three controversial situations related to disorders of hair growth and the pilosebaceous unit: alopecia areata incognita, pseudopelade of Brocq, and the association of psoriasis and alopecia.
authors.affiliation: Sector of Dermatology and Post-Graduation Course, School of Medicine and University Hospital, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: ramos.e.silva@dermato.med.br.
authors.forename: Marcia
authors.initials: M
authors.lastname: Ramos-e-Silva
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Pirmez
mesh_terms: D000505:Alopecia / Q000150:complications* / Q000473:pathology*; D000506:Alopecia Areata / Q000473:pathology; D002921:Cicatrix / Q000209:etiology; D018859:Hair Follicle; D006801:Humans; D011565:Psoriasis / Q000150:complications*