MR imaging of transient @entity572 : An update on 155 XXXX .

@entity1 @entity66 @entity174 @entity170 @entity572 @entity158 @entity236
PURPOSE: @entity572 ( @entity572 ) presents with acute onset @entity158 and @entity236 ( @entity236 ) on MR imaging. The purpose of this study is to revise the MR imaging characteristics of @entity572 by analyzing the data derived from 155 hip examinations. We also sought to explore the relationship between the duration of symptoms and the presence of sparing and subchondral @entity174 . MATERIALS AND METHODS: MR images of 155 hips (141 @entity572 @entity1 ) were retrospectively evaluated for the presence of insufficiency @entity174 and the morphology of @entity236 . Sparing of the medial bone marrow of the femoral head was recorded together with demographic and clinical data. Progression to regional @entity170 (RMO) and postpartum cases were also recorded. RESULTS: Our population consisted of 76.4% male and 23.6% female @entity1 . RMO progression was recorded in 19.4% and 4 postpartum cases displayed @entity66 . Sparing of the medial bone marrow was present at 87.7% of @entity1 and disappeared as the disease progressed (P=0.005). @entity236 was restricted within the femoral head in 11.0%, extended to the femoral neck in 40% and to the femoral shaft in 49% of the cases studied. @entity174 were present at 48.7% of the hips. CONCLUSION: This study describes @entity572 @entity1 characteristics, the MR imaging findings ( @entity236 pattern, microfractures), their association with symptom duration and the chance of progressing to RMO.
