I was misdiagnosed by a radiologist and oncology surgeon and got three separate opinions; they all said it was a "fat necrosis." Finally, six months later, I lied and said, "My lump is growing." I demanded a biopsy. Fine needle biopsy revealed breast cancer. Breast MRI revealed a 1.3 cm tumor. Pathology revealed it was 2.0 cm. I had six cycles of chemotherapy and a bilateral mastectomy. A test is only as good as those who are reading it. The medical system has failed me twice. This is my second bout with breast cancer, so that's why I chose a bilateral mastectomy and no reconstruction. I had dense breasts, but not extreme. If you have dense breasts (50% of women do), you need a mammogram and ultrasound. I always had both and still was misdiagnosed. The only test that is almost 100% accurate is a breast MRI. If you have dense breasts, it might be a good idea to get a breast MRI (even if your insurance doesn't pay for it).