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A lesion having peripheral sclerotic margins measuring 41 x 43 x 45 mm is seen in the intertrochanteric region of the left femur. Its internal matrix is of low signal intensity on T1 and of high signal intensity on T2-weighted and STIR images with intervening low signal intensity septae. It shows mild enhancement on post-contrast images. No associated pathological fracture or soft tissue mass is seen. The additional finding of bilateral greater trochanteric bursitis (left more than right) is also noted.
These MRI features are also in favour of a benign pathology like fibrous dysplasia. Possible differential diagnosis includes low-grade malignancy (e.g.chondrosarcoma) which is less likely, but, cannot be completely excluded.