title: Alopecia areata--Part II: diagnosis and pathology.
abstract: Alopecia areata is characterized by the abrupt appearance of round or oval, non-scarring, flat, single or multiple areas of alopecia, which may coalesce forming large patches of alopecia. The diagnosis is usually clinical but there are important differentials and dermatopathology may help in this definition.
authors.forename: Juliany
authors.initials: J
authors.lastname: Estefan
authors.forename: Marcia
authors.initials: M
authors.lastname: Ribeiro
authors.forename: Eliane
authors.initials: E
authors.lastname: Abad
authors.forename: Simone
authors.initials: S
authors.lastname: Saintive
authors.forename: Marcia
authors.initials: M
authors.lastname: Ramos-e-Silva
mesh_terms: D000506:Alopecia Areata / Q000175:diagnosis* / Q000473:pathology; D046169:Dermoscopy; D003937:Diagnosis, Differential; D006801:Humans; D014006:Tinea Capitis / Q000175:diagnosis; D014256:Trichotillomania / Q000175:diagnosis