Find out more about cancer treatments
About the Treatments
In general, every dose of chemotherapy kills 50 per cent of cancer cells circulating in the blood and lymphatic system at the time; it may therefore take years of chemotherapy treatment to kill the last surviving cancer cell.
Chemotherapy, by definition, kills fast growing cells in the body such as cancer cells. This is the reason why hair falls out following chemotherapy because the hair-root cells are among the fastest-growing cells in the body. Yet hair grows back. It is therefore plausible that some cancer cells may escape death and start multiplying again. Other fast-growing cells in the body are those lining the gut and the chemotherapy agents kill most of these as well. This is the reason for vomiting during chemotherapy.