Reports unilateral ureteral obstruction caused by a barium granuloma after colonic surgery, highlighting diagnostic challenges when preoperative imaging fails.
A small amount of barium extravasated at the time of colonic surgery led to the development of a barium granuloma that caused unilateral ureteral obstruction. Although the barium was not detected on radiography or urography preoperatively, it was clearly visible at the time of ureteral exploration and ureterolysis.
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Walther et al. (1987) studied this question.
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