what causes cancer ?????
Answers
Explanation:
due to carcinogens in tobacco smoke
Answer:
Lifestyle-related factors that cause cancer include:
tobacco
alcohol
UV radiation in sunlight
some food-related factors, such as nitrites and poly aromatic hydrocarbons generated by barbecuing food).
Lifestyles can prevent cancer
Cancer causing factors related to work and living environments include:
asbestos fibres
tar and pitch
polynuclear hydrocarbons (e.g. benzopyrene)
Some metal compounds
Some plastic chemicals (e.g. Vinyl chloride)
Bacteria and viruses can cause cancer:
Helicobacter pylori (H. pylori, which causes gastritis)
HBV, HCV (hepatitis viruses that cause hepatitis)
HPV (human papilloma virus, papilloma virus, which causes changes eg. Cervical cells)
EBV (Epstein-Barr virus, the herpes virus that causes inflammation of the throat lymphoid)
Radiation can cause cancer:
ionising radiation (e.g. X-ray radiation, soil radon)
non-ionised radiation (the sun’s ultraviolet radiation)
Some drugs may increase the risk of cancer:
certain antineoplastic agents
certain hormones
medicines that cause immune deficiency
In 5 – 10 per cent of breast cancer genetic predisposition plays an important role in the emergence of the disease.