A 33-year-old man has chronic abdominal pain and diarrhea during the past two years,but no weight loss or gastrointestinal bleeding. Colonospy with biopsies are normal.What is your most likely diagnosis

  • A: Infectious colitis
  • B: Irritable bowel syndrome
  • C: Ischemic colitis
  • D: Ulcerative colitis
  • E: Crohn disease

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