Write a note an Cancer treatment?

Explanation

The treatment of cancer involves the following methods:
(i) Surgery: Tumours are removed by surgery to prevent further spread of cancer cells.
(ii) Radiation therapy : Tumour cells are irradiated by lethal does of radiation while protecting the surrounding normal cells.
(iii) Chemotherapy: It involves administration of anticancerous drugs which prevent cell division and are used to kill cancer cells.
(iv) Immunotherapy : Biological response modifiers like interferons are used to activate the immune system and help in destroying the tumors.