此骨肉瘤来自一个十几岁的少年的胫骨上部干骺端，它穿越骨皮质延伸到软组织。肿瘤坚固呈灰白色。关节腔处可见闪亮的白色股骨髁的关节软骨恰好靠近肿瘤的右部。
骨肉瘤：股骨(肉眼) 胫骨(肉眼) 股骨远端X线 低倍镜 高倍镜
This osteosarcoma arising in the metaphysis at the upper tibia of a teenage boy breaks through the bone cortex and extends into soft tissue. The tumor is firm and tan-white. The glistening white articular cartilage of the femoral condyle can be seen just to the right of the tumor in the opened joint space.