Paget disease of the bone
Paget disease of the bone is usually polyostotic and asymmetric. In up to 75% of cases the pelvis is involved.
The classical triad of imaging findings are:
- increased size of bone
- thickening of the cortex
- accentuation of the trabecular pattern
In the pelvis typically the trabeculae of the sacrum and ilium is thickened. The central portion of the ilium can undergo rarefaction and resemble a large lytic lesion. The iliopectineal line may be thickened.
Secondary degenerative joint disease with acetabular protrusio can occur.