title: [Etiology of spondylolysis--question on the theory of hypoplasia of the vertebral arch].
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013131:Spine / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013168:Spondylolisthesis / Q000000981:diagnostic imaging / Q000209:etiology*