"Sex reassignment surgery" can also be used to describe the "top surgery" of FTMs, which is usually called male chest reconstruction and sometimes described as a bilateral mastectomy (which is inaccurate because a mastectomy without breast reconstruction results in a concave chest, usually with a vertical scar and no nipple, whereas male chest reconstruction results in scars generally positioned along the pectoral definition line to be relatively invisible and have male appearing shape and nipples).