Spondyloschisis of the anterior arch of the atlas.
D000063:Accidents, Traffic; D000328:Adult; D001270:Cervical Atlas / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000293:injuries; D003937:Diagnosis, Differential; D050723:Fractures, Bone / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D009049:Motorcycles; D011859:Radiography