quote from "Pediatric Surgery (Springer Surgery Atlas)" by Prem Puri, Michael E. Höllwarth -

"Since its development in 1989, the ACE procedure has become widely accepted as a valuable addition to the therapeutic regimens available for treating intractable faecal incontinence associated with conditions such as myelomeningocele and anorectal malformations. Thousands of patients around the world have undergone ACE procedures with success rates in excess of 80% reported. The original procedure described disconnecting the appendix from the caecum, amputating its tip, reversing it, and reimplanting it into a submucosal tunnel on the anterior wall of the caecum to produce a continence mechanism; the stoma was usually sited in the right iliac fossa. Since the original description, numerous modifications have been proposed and introduced, so it is now incorrect to talk about the ACE procedure; and it would be more accurate to use the term ACE principle."

Quote from "Pediatric Surgery (Springer Surgery Atlas)" by Prem Puri, Michael E. Höllwarth -

"In practical terms, there are now two types of ACE, the original caecal ACE and the new left colonic ACE. For the caecal ACE, many surgeons now advocate simply amputating the tip of the appendix and bringing the open end onto the abdominal wall without constructing any continence mechanism. This procedure is being increasingly performed laparoscopically. In fact, since the first description of the laparoscopic approach to the ACE (LACE), the laparoscopy-assisted approach has been applied with good success to many reconstructive urologic procedures, including bladder augmentation, appendicovesicostomy, ileovesicostomy, and ACE procedures."