A Unique Case of Familial Expansile Osteolysis Findings on ^99mTc-MDP Bone Scan

Familial expansile osteolysis is an exceedingly rare autosomal dominant bone dysplasia, which can have overlapping features with Paget disease and expansile skeletal hyperphosphatasia. We present a novel case of familial expansile osteolysis evaluated on Tc-99m-MDP bone scan with correlative radiographs and CT.