Ureteroileourethral anastmosis is a new method of urinary diversion which allows a patient to void in the normal manner. This is a procedure which permits complete removal of the bladder without likelihood of retrograde kidney infection. The left ureter is transplanted to the side of the isolated ileal segment near its proximal end, and the right ureter is anastomosed to the side of the loop distal to the left ureter. The loop is doubled back on itself, and the urethra is joined to the side of the loop just proximal to the distal end. A catheter is passed through the urethra into the new bladder and remains in place for three weeks. There does not appear to be any disturbance of electrolyte balance through absorption from the segment.