A gastrojejunocolic fistula is a disorder of the human gastrointestinal tract.
It may form between the transverse colon and the upper jejunum after a Billroth II surgical procedure.
(The Billroth procedure attaches the jejunum to the remainder of the stomach.)
Fecal matter thereby passes improperly from the colon to the stomach, and causes halitosis.
[citation needed] Patients may present with diarrhea,[1] weight loss and halitosis as a result of fecal matter passing through the fistula from the colon into the stomach.