I am 49 years old and have a tumor in my left breast. Ten years ago, I had an xray and a needle biopsy done, which revealed that, although is is growing, and has continued to grow over the years, wasn't malignant. The receptionist at the doctors office told me at the time she shared the good news that my tumor wasn't malignant, that I should have it removed ASAP, as it can become malignant at any time. I went happily away from the doctor's office, never having actually spoke to him. I have stoically accepted the fact that I'd better have this removed sometime; especially since my paternal grandma died of breast cancer. I have recently become aware of how often I think about this tumor, especially since I am currently without health insurance. I still worry (silently) that this tumor could turn on me and become malignant. Is my worry in vain? Do non malignant tumors become cancerous often?