Results:The lesion is located at tibia in 14,femur 7,radius-ulna 2. the X-ray findings may be divided into two types:(1)cortical or eccentric type (15 cases),(2) medullary or central type (8 cases).

• 结果:病变位于胫骨者14例、股骨7例、尺桡骨2例。根据X线表现分为两型:(1)皮质型或偏心型15例,(2)骨髓型或中心型8例。