Classification Congenital types: tracheoesophageal, vitellointestinal duct, patent urachus, rectovaginal Acquired: trauma (postoperative), radiation, malignancy, infection Two categories Low-output fistula: 500 mL/day Three categories Low-output fistula: 500 mL/day
Enterocutaneous fistula
Pancreatic fistula
Vesicointestinal fistula
Collaural fistula
Anal fistula
Cimino fistula
Gastrojejunocolic fistula
Perianal hematoma