[Fibroepithelial polyp with atypical stromal cells in the trigone of the bladder as a cause of lower obstructive uropathy].

Fibroepithelial polyp of the trigone of bladder conditioning an occlusive syndrome at the bladder cervix level causing secondary multidiverticular bladder with ureterohydro-nephrosis and chronic bilateral pyelonephritis. Besides the rare vesical location for the fibroepithelial polyps, the case also presents some atypical stromal cells.