senile gangrene

例句：

1. 1.The patient's condition worsened rapidly after the surgery.
   手术后，患者的病情迅速恶化。
2. 2. The old man's senile gangrene had spread throughout his body.
   老人的老年坏疽已经扩散到他全身。
3. 3. The doctor prescribed a special medication to treat the patient's senile gangrene.
   医生为患者开了一种特殊药物来治疗他的老年坏疽。