[Clinical and radiological studies of the ossification of the posterior longitudinal ligament].
D000328:Adult; D000368:Aged; D000844:Ankylosis / Q000150:complications; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008022:Ligaments / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging*; D011859:Radiography