Ewing's sarcoma of bone

例句：

1. 1. This patient had a rare form of Ewing's sarcoma that was difficult to treat.
   这位病人患有一种罕见的尤文氏肉瘤，治疗起来很困难。
2. 2.The treatment for Ewing's sarcoma is often aggressive and requires close monitoring.
   尤文氏肉瘤的治疗通常是激进的，需要密切监测。
3. 3. The prognosis for patients with Ewing's sarcoma is generally poor, but early detection can improve outcomes.
   尤文氏肉瘤患者的预后通常较差，但早期发现可以提高结果。