This femur has a large eccentric tumor mass arising in the metaphyseal region 可见股骨骺板处有一体积很大的偏心性肿物。
2.
These tumors most often occur in young persons ( note that the epiphysis seen at the right is still present ) 这种肿瘤好发于青年人（本例可见右侧骺板存在） 。
3.
This osteosarcoma arising in the metaphysis at the upper tibia of a teenage boy breaks through the bone cortex and extends into soft tissue 本例为发生在一青少年患者胫骨上端骺板处的骨肉瘤其突破骨皮质进入软组织。
