[Echography of tumors with multiple localizations in the urinary tract. Apropos of 2 cases]

The authors report 2 cases of unilateral non functioning hydronephrotic kidney, associated with homolateral bladder tumoral filling defect. Cystoscopy and histology showed a non infiltrating tumor. In one case, sonography showed a diffuse tumoral proliferation from the renal pelvis to the bladder and in the other case revealed a tumor located in the lower ureter prolapsed into the bladder. Both were non infiltrating ureteral tumors on histologic examination. These sonographic features, suggesting that the level of obstruction was not the bladder, accounted for the contradiction between urographic findings and lack of histological infiltration.