Hi, This Is For My Syster,she Has 45 Years Old

Hi,

This is for my syster,she has 45 years old ,before 4 years back she had breast cancer and removed the lump and treated with chemo and radiation ,done 6 chemo and 30 radiations ,but now she has a lump on the back side ,according to doctor it is neoro fybroid and suggested one more surgery ,she feels pain from back side to toe sometimes and also have high blood pressure ,the lump is enlarged from the initial stage ,

Is this surgery is complicated ,is it cancer or normal fybroid ?Can you please explain...