I Was Diagnosed W/ Non Hodgkins Lymphoma In 2012(follicular Type).What

I was diagnosed w/ Non Hodgkins Lymphoma in 2012(follicular type).What are the chances of it becoming met athletic? Had a series of 18 Radiation Rx's in mid summer into fall of 2012, no further signs of growth in L Retroperitoneal area ....tumor was found when I had a cystoscopy in Feb 2012. Thank you.