title: [The frequency and practical significance of congenital defect of the posterior arch of the atlas].
mesh_terms: D000328:Adult; D001270:Cervical Atlas / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D016135:Spinal Dysraphism / Q000000981:diagnostic imaging*
vernacular_title: Chastota i prakticheskoe znachenie vrozhdennogo defekta v zadneĭ duge atlanta.