Massive osteolysis. An unusual cause of bone destruction.

A patient who presented with multiple lytic lesions of bone was found to have massive osteolysis. The clinical course of this patient is described and the literature on massive osteolysis reviewed. This disease of uncertain etiology is pathologically marked by resorption of bone, and replacement by angiomas and fibrosis. X-ray findings are usually more severe than expected from the patients' clinical presentation. Laboratory studies, including attempts at biopsy, are generally unrevealing. Drug therapy is of no value, and success of surgical attempts at bone union are unpredictable. Massive osteolysis should be considered in the differential diagnosis of osteolytic lesions, particularly since this disorder can result in serious morbidity.