OBJECTIVE: To explore the clinical characteristics of @entity2530 of the femoral head (ONFH) induced by @entity230 . METHODS: From January 2000 to October 2009, 497 hips in 270 cases of ONFH induced by @entity230 were studied. A questionnaire was administered when the @entity1 were admitted; the questions concerned the underlying disease, duration of @entity134 usage, total dosage of @entity134 , incubation period (time interval between commencement of @entity134 therapy and onset of @entity158 ), severity of @entity158 , location of initial complaint, primary diagnosis, time lag from onset of @entity158 to final diagnosis and physical signs when admitted. The correlations between @entity158 and Association Research Circulation Osseous (ARCO) stage, @entity236 ( @entity236 ) and lesion size were analyzed. RESULTS: The median of time between commencing @entity134 medication and developing ONFH for the 269 cases was 18 months (range, 2-384 months). 78.82% cases presented with @entity158 within three years of @entity134 initiation, only 10.41% @entity1 first complained of @entity158 six or more years after commencing @entity134 therapy. Fifty-six cases (20.82%) were misdiagnosed, lumbar disorders being the most frequent misdiagnoses. 79.29% of symptomatic hips presented with abnormal physical tests. Of 420 symptomatic hips, 166 hips were type C1, 223 @entity1605 ; 299 hips had collapsed; and there was @entity236 in 209 hips. CONCLUSION: Most @entity1 with ONFH induced by @entity230 complained of @entity158 within 3 years of commencing @entity134 therapy. @entity158 was associated with lesion size, collapse and @entity236 . Atypical location of @entity158 , failure to perform a physical examination and MRI findings were the main causes of misdiagnoses.

Clinical analysis of XXXX of the femoral head induced by @entity230 .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1605 :: ('OMIM:217000', 'Disease') :: ['hips type C2'] @entity134 :: ('CHEBI:35341', 'Chemical') :: ['steroid'] @entity158 :: ('MESH:D010146', 'Disease') :: ['Pain', 'pain'] @entity230 :: ('MESH:D013256', 'Chemical') :: ['steroids'] @entity236 :: ('MESH:D001855', 'Disease') :: ['bone marrow edema', 'BME'] @entity2530 :: ('MESH:D010020', 'Disease') :: ['osteonecrosis']
@entity2530 :: (MESH:D010020,Disease) :: ['osteonecrosis']
