title: [Aplasia of the posterior arches of the atlas: a presentation of 2 cases].
abstract: BACKGROUND
  Aplasia of the posterior arches of the atlas is an uncommon condition caused by a defect in their closure. It is usually associated with different syndromes.
  
  
  METHODS
  We present 2 asymptomatic patients with aplasia of C1 posterior bodies.
  
  
  CONCLUSIONS
  Further studies are required on these lesions in order to take possible protection measures against trauma, and the selection between conservative or surgical treatment.
authors.affiliation: Unidad de Cirugía de Mano, Servicio de Cirugía Ortopédica y Traumatología, Hospital de Verín, Verín, Orense, España. tqa1981@hotmail.com
authors.forename: T
authors.initials: T
authors.lastname: Quinteiro Antolín
authors.forename: I
authors.initials: I
authors.lastname: Castellano Romero
authors.forename: J
authors.initials: J
authors.lastname: Yáñez Calvo
mesh_terms: D058070:Asymptomatic Diseases; D001270:Cervical Atlas / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography