Fig. 5
From: MR imaging of the reconstructed breast: What the radiologist needs to know
a GAP flaps are based on perforators from either the superior or inferior gluteal artery. Superior gluteal artery perforator (SGAP) flaps allow transfer of tissue from the buttock using the superior gluteal arty as a vascular pedicle for transfer of tissue. Inferior gluteal artery perforator (IGAP) flaps allow transfer of tissue from the buttock using the inferior gluteal artery as a vascular pedicle for transfer of tissue. b The transversus upper gracilis (TUG) flap procedure uses tissue from the inner portion of the upper thigh for breast reconstruction. c Axial nonfat-saturated T2W axial image showing, SGAP reconstruction with microvascular surgical anastomosis of the superior gluteal artery to the internal mammary artery (white arrow). For comparison, note the normal glandular tissue in the right breast. d Sagittal fat-saturated T1W image with dynamic gadolinium injection shows replacement of the normal glandular tissue of the breast with lower abdominal fat and the anastomosis of the vascular pedicle by microsurgical technique to the internal mammary artery (white arrow)