abnormal ureter morphology ureterocele 2012-11-01T01:30:31Z MP:0011767 MPheno.ontology csmith saccular dilation of the terminal portion of the ureter that protrudes into the lumen of the urinary bladder, probably due to a congenital stenosis of the ureteric orifice meatus; most often associated with a duplicated collection system, where two ureters drain their respective kidney instead of one ureterocoele