We report a 29-year-old male who had received 5-ASA for ulcerative colitis for about eight months before developing oliguria and pitting edema with sudden onset.

• 一位29岁的男性接受5-ASA治疗溃疡性大肠炎八个月后，突然发生小便变少及全身水肿的情形，病人并无其他的疾病或是药物使用；