title: An unusual variation in the fifth lumbar and sacral vertebrae: a possible cause of vertebral canal narrowing.
mesh_terms: D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000002:abnormalities* / Q000000981:diagnostic imaging; D011859:Radiography; D012447:Sacrum / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013117:Spinal Cord Compression / Q000209:etiology