Fistula is most common in
Clinical features Fibrosing strictures, paicularly of terminal ileum is common and requires surgical resection. Fistulas develop between loops of bowel and may also involve the urinary bladder, vagina, and abdominal or perianal skin. Perforations and peritoneal abscesses are common. TEXT BOOK O F ROBBINS BASIC PATHOLOGY NINTH EDITION PAGE.590
Crohn's disease
Ulcerative colitis
Infective entero colitis
Coeliac sprue
G.I.T