[Prenatal diagnosis of the sequelae of supravesical stenoses--hydronephrosis and hydroureter]

In the introduction, the extrarenal and intrarenal pelvis are distinguished and morphologically recognizable reasons for the dilatation of the renal pelvis and the ureter are shown. With examples from twelve corresponding cases from an a.p. diameter of 10 mm upwards, contributions to the following problems are offered: Time of earliest possible prenatal diagnosis, relation between dilatation of the pyelon and thickness of the parenchyma, on the one hand, and the mean value of the abdominal diameter, on the other hand. In addition to the degree of the narrowing of the lumen the importance of the secretal function of the kidneys which begins in the course of the development is discussed.