Hi - First of all, your father's bone cancer doesn't put you at added risk for breast cancer, so put that worry out of your head. But a mass that's getting bigger shouldn't be ignored. If you're 46, you should have been having regular mammograms. If you haven't been, put it in your mental caldndar to schedule one every year. And also ask your OB/GYN whey she's not worried about a lump that's been there awhile, is painful, and is growing. I'd think this would trigger some diagnostic testing: mammogram, MRI, ultrasound, something. In other words - you need to follow up with your doctor, not let this drop, OK? Good luck - PJH