Abstract： To the Editor:A 67-year-old man presented with recurrent diarrhea and abdominal pain of increasing severity for 7 months in May 2016.He had mucopurulent stool for about 4-6 times a day,with bellyache,tenesmus,and weight loss.He took a colonoscopy,which showed universal colitis,and a biopsy revealed crypt abscesses and inflammatory cell infiltration and he was diagnosed with ulcerative colitis (UC).