s not necessarily a sign of
breast cancer...There are several things that could cause an inverted
nipple,for example,an inflammation or infected ducts in the breast,a benign tumor or a cyst,but sometimes it could also be a sign of a serious underlying condition.It's a good thing that your wife is having this problem investigated by a physician who will most probably order a few tests such as a Mammogram/Ultrasound for a correct diagnosis. .