Distinct focal lesions of the femoral head: imaging features suggesting an atypical and minimal form of XXXX .

@entity1 @entity39 @entity75 @entity891 @entity79 @entity3061 @entity2530
OBJECTIVE: To document the imaging findings observed in @entity1 with an unusual pattern of abnormality of the femoral head, most likely representing @entity2530 . DESIGN AND @entity1 : The imaging findings in 11 @entity1 (10 @entity1 , 1 @entity1 ; age range 32-55 years) with a distinct lesion of the femoral head were reviewed with particular attention to the morphologic appearance, location, and extent of the lesion(s) in the proximal femur. RESULTS: The 16 lesions identified in these @entity1 extended to the subchondral area. @entity891 was not evident in any hip. Radiography and CT showed areas of mixed @entity79 and @entity3061 surrounded by sclerotic margins. On MR imaging, the signal intensity characteristics of the @entity75 (s) were most commonly similar to those of fluid. Histopathologic findings, available in two hips, were typical of @entity2530 . There was evidence of correlation of the site of the lesion with the known general distribution and anastomoses of arteries supplying the femoral head. CONCLUSION: A distinct, focal lesion of the femoral head is believed to represent an atypical form of @entity39 . Its restriction to a small portion of the femoral head may relate to localized vascular anatomy. Recognition of the quite characteristic imaging findings can prevent misdiagnosis and may have implications for the prediction of the natural course of the disease.
