这是切成三部分的骨软骨瘤。淡蓝色的软骨帽覆盖于骨皮质上。可能不是真的肿块，而从长骨骺端向外突出的病损。
This is an osteochondroma cut into three sections. A bluish-white cartilagenous cap overlies the bony cortex. These are probably not true neoplasms, but they are a mass lesion that extends outward from the metaphyseal region of a long bone.