What Is The Treatment For Breast Cancer And Fatty Tissue In The Pelvic Region?

I am a 55 year old female with breast cancer. I've had pain/swelling in my right thigh/ankle for months. I've had a pelvic CT scan, and two sonagrams on my leg. the sonagrams were normal, the ct scan showed a mass of fatty tissue in the pelvic area that is also contected to the hip. the doctor said this is not the cause of the swelling/pain in my thigh/ankle.