title: Clinical and radiographic features of spondylitic hip disease.
abstract: The clinical and radiographic features of hip disease in 76 patients with definite ankylosing spondylitis have been studied. Symptomatic hip involvement occurred late in the course of the disease, with a mean delay after the onset of 12 years in males and 7 years in females. Patients with disease onset before the age of 20 developed hip symptoms at an earlier stage. Associated diseases included uveitis (13%), colitis (4%). Bilateral concentric loss of hip joint space with a relatively undeformed femoral head was the commonest radiological change (61%). Localised loss of joint space at the upper pole (16%) was associated with femoral head destruction and a greater degree of osteophytosis, suggesting coincidental or secondary osteoarthrosis. Bony ankylosis of the hips (10%) was present only in women, and the absence of osteophytes, cysts, and bone lesions of the iliac crests and ischial rami suggests that it is a distinct radiographic manifestation of female ankylosing spondylitis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D012737:Sex Factors; D013167:Spondylitis, Ankylosing / Q000000981:diagnostic imaging*