Is it true past cancer patients have a history of having later GI problems later in life?

i was diagnosed with cancer in summer 2010. a month before my 15th birthday.. i had an emergency surgery to see what was going on. they found 2 massive tumors . one about 8 cm and the other was 10 cm. i was diagnosed with stage 3 non hodgkins lymphoma. i started aggressive chemotherapy after the surgery. according to something i looked up, people who have recieved chemo/radiation have bad GI problems later in life? have a lot of intestinal issues? just wondering if i heard was true, i know you can't believe everything on the internet ....