Crohn's disease

DDx

Ulcerative colitis
Irritable bowel syndrome
Appendicitis
Yersinia enterocolitica enteritis
Mesenteric adenitis
Intestinal lymphoma
Segmental colitis due to ischemic colitis, tuberculosis, amebiasis, chlamydia
Diverticulitis with abscess
NSAID-induced colitis
Perianal fistula due to other causes, e.g., lymphogranuloma venereum, cancer, rectal tuberculosis

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