title: A classification of the anomalies of the first branchial groove.
abstract: Anomolies of the first branchial groove cleft are common and variable. There has been, however, a tendency in the literature to refer to only one or two types as the first branchial cleft syndrome. A classification of first groove anomalies is offered to clarify this topic. Anomalies can be divided into aplasia, atresia, stenosis, and duplication.
mesh_terms: D001934:Branchial Region; D001935:Branchioma / Q000151:congenital; D003251:Constriction, Pathologic / Q000151:congenital; D004424:Ear Canal / Q000002:abnormalities*; D006801:Humans; D014432:Tympanic Membrane / Q000002:abnormalities*