fibroadenomas are almost always none cancerous. They can be common in woman with fiberous breast tissue. I had one removed at age 16, and have never had a regrowth. There is a scar, and an indentation were the lump used to be, but none of my lovers have ever taken issue with it. I say get it taken out, even though it is more than likely not cancer, it can continue to grow, sometimes very quickly.