lithiasis

例句：

1. 1.He developed a stone in his kidney and had to undergo surgery to remove it.
   他肾脏里长了石头，不得不接受手术取出。
2. 2.The patient was diagnosed with appendicitis and underwent an emergency operation for removal of the abscess.
   病人被诊断出阑尾炎，并接受了紧急手术以移除脓肿。
3. 3. Lithiasis is a condition characterized by the presence of hardened stones in the urinary tract.
   石胆病是一种特征为泌尿系统内出现硬化结石的状况。