We had studied the therapeutic results of four cases of fibrous dysplasia in our clinic. Two cases of them were monostotic and the others were polyostotic fibrous dysplasia. There was no Albright's syndrome. Curettages with bone graft were carried out at six times in total. One of bone grafts was autograft and five were heterograft. In the treated bone lesions described above, there were three lesions recurred within a year. The recurrence developed in adolescent patients and there was no recurrence in adult patient despite with recurrent condition. In one of the patients, a postradiation osteogenic sarcoma had developed and the patient died after six months of malignant change.
