title: [Variants of the pro-atlas, their x-ray anatomic characteristics and pathogenetic significance].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D014644:Genetic Variation; D006801:Humans; D008297:Male; D008875:Middle Aged; D009777:Occipital Bone / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011859:Radiography
vernacular_title: Varianty proatlanta, ikh rentgeno-anatomicheskie osobennosti i patogeneticheskoe znachenie.