Extension and modification of Mitrofanoff technique for continent urinary diversion using an appendiceal/bladder anastomosis. Appendix is left in situ; bowel loops are opened and sewn back together to form high-capacity, low-pressure reservoir pouch; both ureters are implanted into into large bowel end of pouch with generous submucosal tunnels to retard reflux. In situ appendix is then embedded in the cecum.