A 32-Year-Old Man with Abdominal Pain and Periodic Diarrhea Is

A 32-year-old man with abdominal pain and periodic diarrhea is found to have heme-positive stools.  Stool cultures show no growth of pathogenic organisms.  Colonoscopy with biopsy of the colonic mucosa is performed.  Light microscopy of the tissue sample is shown in the image below. This patient most likely suffers from which of the following disorders?

A) Acute appendicitis
B) Collagenous colitis
C) Crohn disease
D) Ischemic colitis
E) Pseudomembranous colitis
F) Ulcerative colitis

Correct Answer:

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