osteosarcoma of chest wall

例句：

1. 1. The patientwas diagnosed with osteosarcoma atthe age of 20.
   这名患者20岁时被诊断出患有骨肉瘤。
2. 2. Osteosarcoma is arare but aggressive form of cancer that canoccur in any part of the body.
   骨肉瘤是一种罕见的但具有侵袭性的癌症，可以在身体的任何部位发生。
3. 3. Treatment forosteosarcoma often involves surgery andradiation therapy.
   治疗骨肉瘤通常需要手术和放疗。