Craniovertebral anomalies.
D000328:Adult; D005539:Foramen Magnum / Q000002:abnormalities / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D011859:Radiography; D012886:Skull / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013131:Spine / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013595:Syringomyelia / Q000000981:diagnostic imaging / Q000209:etiology