1. Chondrosarcoma is a rare type of cancer that forms in the bones and is most commonly found in adults.
软骨肉瘤是一种罕见的癌症，形成于骨骼中，最常见于成年人。

2. The treatment options for chondrosarcoma include surgery, radiation therapy, and chemotherapy.
软骨肉瘤的治疗选择包括手术、放射疗法和化疗。