canceration of ulcer

例句：

1. 1. The patient's cancer treatment has been very aggressive.
   患者的癌症治疗非常激进。
2. 2. Cancer is a disease that can spread to other parts of the body.
   癌症是一种可以扩散到身体其他部位的疾病。
3. 3.Early detection and treatment of cancer are crucial for successful outcomes.
   早期发现和治疗癌症对于成功的预后至关重要。