[A study of the native kidneys in patients with chronic renal failure. Report 1: Morphological changes and occurrence of acquired cysts of the native kidneys in patients with chronic renal failure].

As morphological changes of the native kidneys, the presence of acquired cysts, intra-renal calcification and renal tumor was investigated mainly by ultrasonography and computed tomography in 151 patients with chronic renal failure. 1) Among 140 uremic patients caused by medical diseases. 40 patients had simple cysts, and 37 had acquired cystic disease of the kidneys (ACDK). However 4, uremic patients caused by urological diseases were not seen to be with an acquired cysts. 2) The patients with ACDK were with significantly longer durations of dialysis therapy than those with simple cysts or no cysts. Furthermore, the patients with ACDK were younger than those of the other groups. 3) Intra-renal calcification was more frequently found in patients with cystic disease (simple cyst, ACDK and polycystic disease) than in those without cystic disease with statistic significance. 4) Native kidneys became larger after the occurrence of ACDK. 5) Three cases of renal tumor were found.