[Current diagnostic technics in the prediction of the functional recovery of a urographically silent kidney].

25 patients with a silent kidney, because of obstructive uropathy, have been studied. Authors' aim was to find out some parameters which could be able to predict renal function recovery once the obstruction was removed. 99m Tc DTPA renal scintiscanning, renal ultrasonography, and the study of renal clearances on the urine obtained via a percutaneous nephrostomy were executed. The authors observed that when the nuclide renal uptake is absent a minimal functional recovery is still possible and it may be foretold only analysing the urine collected through a percutaneous nephrostomy.