title: Caudal anesthesia in a patient with ankylosing spondylitis for hip surgery.
mesh_terms: D000763:Anesthesia, Caudal; D000767:Anesthesia, Epidural; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012445:Sacrococcygeal Region / Q000000981:diagnostic imaging; D013167:Spondylitis, Ankylosing / Q000150:complications* / Q000000981:diagnostic imaging