Contrast material not injected due to chronic renal failure.
Right:
Normal bone and joint structure, as well as bone marrow signal of the osseous structures contained in the scan, except for patellar subchondral cysts.
Pronounced swelling of the vastus medialis muscle, particularly its distal half. Diffuse pathological signal of the muscle, heterogeneous in its distal part, probably evidence of loss of normal muscle architecture. Similar, if less intense, changes in the middle part of the vastus intermedius muscle and in several of the muscles in the posterior and lateral thigh.
Subcutaneous oedema and perifascial fluid accumulation around the anterior and lateral compartment.
Left: Normal appearance of osseous and soft tissue structures.
In view of the clinical picture, the findings are most consistent with diabetic myonecrosis.