I recently had abnormal mammogram with follow up compression showing oval mass in the right breast with an oval density adjacent to the mass, which is less opaque. Ultrasound demonstrates solid 10 x 7 x 9 mm mass within one macrolobulation, borders partially well defined, internal echogenicity somewhat inhomogenous and increased through transmission. Minimal ductal ectasia. BIRADS 4 Am scheduled for excisional biopsy as this was the only type biopsy recommended. I have had regular mammograms since age 35, I am now 44. I have seen a breast surgeon regularly for problems in the left breast (cysts, nipple discharge, pain), but right breast has always been problem-free. My grandmother had breast cancer with bone mets. My mother died of pancreatic cancer at 43. There is a strong family history of pancreatic cancer, but no other breast cancer that I am aware of. I guess, due to family history of cancer, I am more than a little concerned. Could a cancer develop so suddenly, given my regular exams, and is excisional biopsy the most often recommended under these circumstances? Thank you, in advance, for your response.