Breast reconstruction often falls into two categories. Breast implants made of silicone or saline are placed beneath the chest muscle to change the shape or size of the breast. Flap reconstruction removes muscle, fat or skin from another part of the body to reconstruct the breasts. DIEP flap reconstruction removes fat and skin from the abdominal area in order to create a new breast mound. TRAM flap surgery makes an incision along the bikini line. An oval section of fat, skin and muscle is taken from the lower half of the stomach and moved to the chest to make a breast shape. Breast reconstruction is often performed after a woman has a mastectomy due to breast cancer.