plasmacytoma pelvis LSBU

Description: Radiology case 4411-3451 Clinical presentation: 60 year old man with left buttock pain, getting worse for the last 10 years. Monoclonal gammopathy, IGG.
There is a lytic expansion of the left ilium by a cyst like lesion with a multi-loculate appearance. The lesion extends from the left acetabulum through the ilium, but does not extend very much into the left ischium or pubis. The boundary does not correpond to the site of the former 'y' cartilage or synostosis. The upper medial cortical margin of the expanded ilium is not visible. There is visible osteoarthrosis in the hips and lumbar spine .