I felt a large lump under my right arm. I dreaded going in to have it checked. I had completed breast cancer treatment 6 1/2 years earlier and after a lumpectomy and radiation treatement was told I was cancer-free with no expectations of recurrance. I had yearly ultrasounds on both dense breasts with no problems. And then seemingly overnight, there was a large lump under my arm. The biopsy confirmed cancer. Again.