骨肉瘤的显微外观。肉瘤细胞有明显的多形性，常呈梭形。靠近中心处可见一巨核肿瘤细胞。还可见反应性的新生骨岛。
骨肉瘤：股骨(肉眼) 胫骨(肉眼) 股骨远端X线 低倍镜 高倍镜
The microscopic appearance of an osteosarcoma is shown here. Sarcomas have very pleomorphic cells, often with a spindle shape. One large cell with very large nuclei is seen near the center. There are islands of reactive new bone.