Systemic fibrous dysplasia involving multiple bones in human body. Report of 4 cases.

Four cases of systemic fibrous dysplasia were selected from 356 cases of fibrous dysplasia. All of them were verified pathologically. In these 4 cases, the long, short, flat and irregular bones were involved. Some of the changes were characteristic in comparison with those of the monostotics or regional types. This disorder was often seen clinically in females, started in early childhood and exacerbated during puberty. Its main symptoms were primary or secondary deformities. Radiologically, the main changes were diffuse and uniform expansion and developmental disturbances of the bones and joints.