1 There are over 200 types of cancer.  Anything that may cause a normal body cell to develop abnormally potentially can cause cancer; general categories of cancer-related or causative agents are as follows: chemical or toxic compound exposures, ionizing radiation, some pathogens, and human genetics.
Chemotherapy uses anti cancer (cytotoxic) drugs to destroy cancer cells. For some types of brain tumour you may have chemotherapy after surgery, to try to prevent the tumour from coming back. Chemotherapy is sometimes given with radiotherapy and for some months afterwards to help people to live longer.hemotherapy works very well for some types of brain tumour but it does not work for all of them. You may have some types of chemotherapy in cycles. You have the drugs for a few days every few weeks.
Side effects of brain tumour radiotherapy. This page tells you about the side effects you may have during brain tumour radiotherapy and for a few weeks after treatment. There is separate information about delayed or long term side effects which may happen from a few weeks to several months after treatment.iredness is a common symptom with any radiotherapy treatment. With a course of treatment for a brain tumour, you are likely to feel more and more tired as the course goes on. Sometimes, people sleep practically all day during the final week of their treatment.