Would the doctor prescibe radiation if they weren't sure someone had cancer?

There are radiopharmaceuticals that are oral treatments - small amounts of radiation that is given by mouth, injection, placed in the eye or directly into the bladder. These radiopharmaceuticals treat many different types of conditions and diseases including some types of cancer. They are given usually in a hospital setting since no one knows how the patient will react to the treatment. It is doubtful that your cousin has the correct story . .either he is misunderstanding your Aunt, she is not telling the truth, or she is confused about what is going on. If she had cancer than the doctor would be putting her through tests to confirm a diagnosis . . no one is treated for cancer before they are diagnosed.