There is an expansile lytic bubbly and septated lesion involving the left acetabulum and left ischium, which is characterized by:
- no abnormal soft tissue component
- no periosteal reaction
- no evidence of cortical break
- narrow zone of transition
There is an associated with left protrusio acetabulum and shortening of the left lower limb. The left head of the femur seems to be not involved. The differential diagnosis of such findings:
Benign entities as giant cell tumor, brown tumor (hyperparathyroidism) and fibrous dysplasia.
Malignant entities as plasmacytoma and metastasis.