Megauréter primario no refluyente detectado prenatalmente

Primary non-refluxing megaureter is usually a functional and benign congenital malformation that resolves during the first months of life. Although the malformation can persist, only a few patients require surgical treatment. Most authors agree that initial treatment should not be surgical and that surgery should be reserved for patients who develop ureteral dilation, a decrease in differential renal function, and/or severe symptoms during follow-up. In a few patients (7 % of our series), the renal unit belonging to the megaureter shows irreversible congenital injury. In these patients, surgery is not useful.