Hi, My father recently had radiotherapy for prostate cancer (that he was told, hadn't spread). Now some 2 months after the radiotherapy ended, he is experiencing stomach pains on a daily basis and he is now worried that the cancer has spread. Does anyone know of stomach pains being a side effect, this long after the radiotherapy ended? We were told that the radiotherapy was successful but he hasn't had any scan since the therapy ended. Thanks for your help.