[The morphofunctional status of the contralateral kidney in hydronephrosis as the criterion of the efficacy of surgical treatment in the past].

An x-ray examination has been performed for 109 patients operated on for unilateral hydronephrosis since 1980. All the children underwent surgery according to Andersen-Hines-Kucher. Long-term follow-up excretory urography determined the coefficient of surface area for the contralateral and operated on kidney. The coefficient served a criterion of the kidney morphology and function. The paper provides follow-up morphological parameters for both kidneys in relation of the obstruction degree, postoperative period, age of the child at the moment of the surgery. In hydronephrosis of the 1 degree morphological changes in the kidney did not occur, 2-degree hydronephrosis abnormalities in the kidney disappeared after the surgery by the 3 postoperative year. In severe disease morphological recovery was observed to the end of postoperative year 6, whereas intensive growth of the parenchyma owing to immature renal structures lasted for 3 postoperative years. In similar obstruction, more serious changes in the renal tissue occurred in younger children which may be due to more pronounced shifts in renal tissue differentiation.