[Congenital mesoblastic nephroma in infancy--survey of 74 cases with regard to recidivism and therapeutic results (author's transl)].

The congenital mesoblastic nephroma is clearly distinguishable from Wilms' tumour. Almost exclusively it becomes manifest in early infancy. From the literature 71 established cases were complied, 3 own cases have been added. By many authors this tumour was characterized as benign. There has been, however, a total of 7 recurrences. An epicritical review is given of the course of one own case. The complications arising from radio-and chemotherapy clearly indicate that surgery is the method of choice of semi-malignant tumour.