Women who do not have an adequate amount of abdominal tissue for reconstruction may be eligible for GAP (gluteal artery perforator) flap breast reconstruction. This procedure uses excess skin and fat from the gluteal (buttock) region and leaves all the gluteal muscle behind. Like the DIEP flap all the patient's muscle is left in place to preserve function and make recovery easier.
Your surgeon may take skin and fat from either your upper ("superior") or lower ("inferior") buttock region. These are referred to as the "sGAP flap" or "iGAP flap" respectively. Both incisions are easily hidden with underwear.