Diane, Laurie is right. Even with a mastectomy, SOME breast tissue can possibly remain. It's unusual, but happens. What tests do the docs propose next for you? Please ask if anyone has considered inflammatory breast cancer... I'm not a doctor,and it may be impossible, and if not impossible, would be VERY unusual, but your symptoms sound similar to those of IBC. So please ask about that. And I hope they figure it out, because even with a double mastectomy, I can understand you still worrying... Best of luck- PJH