Muscle transposition

A procedure in which gluteal (buttock) or gracilis (inner thigh) muscles are used to encircle and strengthen the anal canal. When the inner thigh muscle is used, pacemaker-like electrodes are implanted into the grafted muscle to train it to remain contracted. When the buttock muscle is used, the lower portion of this muscle is freed from the tailbone region and wrapped around the anus to construct a new anus. The buttock muscle transposition does not require the use of a pacemaker.