[Multifocal sarcoma associated with Paget's disease of bone. Effects of dichloromethylene diphosphate (author's transl)].

A 68-year-old man with old-standing Paget's disease of bone developed in 1975 an isolated sarcoma of the left elbow confirmed by biopsy. The sarcoma responded to irradiation and multiple chemotherapy. In August 1979, pain started along the right sciatic nerve. Clinical examination revealed a tumour deep in the right gluteal region, which was found to be another sarcoma close to the sacro-iliac joint, Cobalt irradiation produced little symptomatic improvement, and the patient died four months later, presumably of metastases. Since January 1979 the Paget's disease had been treated with dichloromethylene diphosphate with satisfactory clinical, biochemical and histological results, but the drug did not influence the course of the sarcoma.