What are the treatment of cancer and the preventive measures for cancer?

Explanation

The treatment of cancer involves the following methods:
(a) Surgery: Tumours are removed by surgery to prevent further spread of cancer cells.
(b) Radiation therapy: Tumour cells are irradiated by lethal doses of radiation while protecting the surrounding normal cells.
(c) Chemotherapy: It involves the administration of anticancerous drugs, which prevent cell division and are used to kill cancer cells.
(d) Immunotherapy: Biological response modifiers like interferons are used to activate the immune system and help in destroying the tumors.
Preventive measures for cancer:
(a) Cancer control programmes should focus on primary prevention and early detection.
(b) To prevent lung cancer, tobacco smoking is to be avoided.
(c) Protective measures to be taken against exposure to toxic pollutants of industries.
(d) Excessive exposure to radiation is to be avoided to prevent skin cancer.