title: A rare extra-articular manifestation of ankylosing spondylitis: cauda equina syndrome.
mesh_terms: D000368:Aged; D002420:Cauda Equina; D006801:Humans; D008297:Male; D009461:Neurologic Manifestations; D013167:Spondylitis, Ankylosing / Q000150:complications*; D013577:Syndrome