title: Congenital anomaly of craniovertebral junction: atlas-dens fusion with C1 anterior arch cleft.
abstract: A rare case of congenital atlantoaxial block is reported. A 13-year-old boy had a fusion of a non-separated odontoid process with the anterior arch of the atlas, in association with an anterior midline C1 arch cleft.
authors.affiliation: Servicio de Rehabilitación, Hospital Carmen y Severo Ochoa, Cangas del Narcea, Spain.
authors.forename: José R
authors.initials: JR
authors.lastname: Pérez-Vallina
authors.forename: Isolina
authors.initials: I
authors.lastname: Riaño-Galán
authors.forename: Angeles
authors.initials: A
authors.lastname: Cobo-Ruisánchez
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Orejas-Rodriguez-Arango
authors.forename: Carlos
authors.initials: C
authors.lastname: López-Muñiz
authors.forename: José M
authors.initials: JM
authors.lastname: Fernández-Martínez
mesh_terms: D000293:Adolescent; D001270:Cervical Atlas / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D002574:Cervical Vertebrae / Q000002:abnormalities / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D009809:Odontoid Process / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D011859:Radiography