<qa>  What is the ileostomy that is reversed when the patient demonstrates the abilityOUTLINE: Patients undergo abdominoperineal resection APR with perineal colostomy and diverting loop ileostomy. At least 3 months after APR, patients undergo placement of the Acticon Neosphincter prosthesis. At least 6 weeks after prosthesis placement, the prosthesis is activated. When the patient demonstrates the ability to operate the prosthesis, the ileostomy is reversed. 