The lesion within the right femoral neck containing fluid – fluid levels represents what pathology?
An aneurysmal bone cyst. These are commonly associated with an underlying process such as fibrous dysplasia.
The high STIR signal lesions within the thigh musculature likely represent what?
Intramuscular myxomas
The combination of polyostotic fibrous dysplasia with intramuscular myxomas is specific for what syndrome?
Mazabraud syndrome
There is diffuse intraosseous abnormality characterized by heterogeneously increased STIR signal which is intermediate to low on T1 involving the right iliac bone, anterior acetabulum, femoral head, neck, metaphyses and diaphysis. The cortex is thinned throughout most of the femur to a varying degree, with several regions of severe cortical thinning.
A large area of cystic degeneration with fluid-fluid levels is present within the right femoral neck. The cortex is severely thinned surrounding this area, however no displaced fracture is noted at this site. There is a small right hip effusion with no adjacent soft tissue edema.
At least 3 discrete intramuscular masses with low T1 and high STIR signal are present, which demonstrate heterogeneous enhancement following contrast administration. The largest of these lies within the vastus intermedius.