Multiple ureteral diverticula: a possible radiographically demonstrable risk factor in development of transitional cell carcinoma.

Six cases of multiple ureteral diverticula are reported. Most were associated with urinary tract obstruction or stasis and infection. One-third had transitional cell carcinoma, a frequency similar to that reported in previous series. These diverticula are a radiographically demonstrable reflection of urothelial hyperplasia/metaplasia and may represent a risk factor for development of transitional cell carcinoma.