title: Ossification of the posterior longitudinal ligament in ankylosing spondylitis.
mesh_terms: D000328:Adult; D006801:Humans; D008022:Ligaments; D008297:Male; D009999:Ossification, Heterotopic / Q000150:complications*; D013131:Spine; D013167:Spondylitis, Ankylosing / Q000150:complications*