Cancer treatments are usually of three types – chemotherapy, radiation and surgery. The type of therapy that a doctor will recommend depends on the type of cancer, how far it has progressed and where in the body it is located. Chemotherapy or cancer drugs are recommended when cancerous cells are present in various parts of the body. Radiation targets the cancerous cells directly and prevents them from replicating while surgery directly removes the cancerous tumour. Doctors usually recommend a combination of these treatments.