Renal pelvic and ureteral dilatation in male rats ingesting trisodium nitrilotriacetate

Renal pelvic and proximal ureteral dilatation has been observed in male Charles River (CD) and Fischer 344 rats ingesting comparable doses of Na 3NTA.H 2O. Ureteral dilatation is accompanied by epithelial surface ulceration and erosion. Taken together with previous work (Anderson, Alden & Merski, Fd Chem. Toxic. 1982, 20, 105), these findings demonstrate that the ingestion of high doses of NTA results in similar effects on the transitional epithelium throughout the urinary tract.