Suggest Remedy For Growing And Painful Mass In Thigh

I have a large mass in my upper right thigh. It has grown from 1 cm to 9x7 cm since april 2013. I had a needle biospy performed as I am a breast cancer survior of 10 years. The biopsy came back stating that it had fibrocystic cells and a fat pad. No one seems to be concerned that the area is increasing in size and is causing pain down my leg.
What would you recommend?
Thanks, Donna