Polyuria of diabetes insipidus and psychogenic polydipsia can produce massive dilatation of
the urinary tract in the absence of any mechanical obstruction. Renal failure in these cases
is rare. We report the second case of nephrogenic diabetes insipidus with nonobstructive
hydronephrotic renal damage. Temporary suprapubic drainage restored renal function to
normal and decreased the upper tract dilatation. Renal function has been preserved for
more than 10 years. Surgical intervention beyond temporary vesical drainage is …