Spontaneous disruption of the colon associated with pyonephrosis: report of a case.

We report a case of reno-colic fistula with abscess formation, which was treated by staged surgical procedures. One must be wary of automatically implicating the colon as the primary source of the problem when the colon and adjacent organs are involved in an inflammatory process. In cases involving the superior segments of the colon, the kidney or pancreas may be the source of the fistula.