Everyday we heard about cancer and do you what cause Cancer.  Actually Cancer arises from one single cell. The transformation from a normal cell into a tumour cell is a multistage process, typically a progression from a pre-cancerous lesion to malignant tumours. These changes are the result of the interaction between a person’s genetic factors and three categories of external agents, including:

*physical carcinogens, such as ultraviolet and ionizing radiation
*chemical carcinogens, such as asbestos, components of tobacco smoke, aflatoxin (a food contaminant) and arsenic (a drinking water contaminant)
*biological carcinogens, such as infections from certain viruses, bacteria or parasites.

World Cancer Day 2010, 4 February. This year new campaign “Cancer can be prevented too ”

Some examples of infections associated with certain cancers:

*Viruses: hepatitis B and liver cancer, Human Papilloma Virus (HPV) and cervical cancer, and human immunodeficiency virus (HIV) and Kaposi sarcoma.
*Bacteria: Helicobacter pylori and stomach cancer.
*Parasites: schistosomiasis and bladder cancer.

Ageing is another fundamental factor for the development of cancer. The incidence of cancer rises dramatically with age, most likely due to a buildup of risks for specific cancers that increase with age. The overall risk accumulation is combined with the tendency for cellular repair mechanisms to be less effective as a person grows older.

Tobacco use, alcohol use, low fruit and vegetable intake, and chronic infections from hepatitis B (HBV), hepatitis C virus (HCV) and some types of Human Papilloma Virus (HPV) are leading risk factors for cancer in low- and middle-income countries. Cervical cancer, which is caused by HPV, is a leading cause of cancer death among women in low-income countries.

In high-income countries, tobacco use, alcohol use, and being overweight or obesity are major risk factors for cancer.

Related Posts