title: Lumbar vertebral arch defect due to unilateral dyssegmentation.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000002:abnormalities* / Q000000981:diagnostic imaging; D011859:Radiography; D013122:Spinal Diseases / Q000150:complications; D013580:Synostosis / Q000000981:diagnostic imaging