Cancer is also known as malignant tumor. Cancer is more dangerous, or malignant, tumors. Cancer is a group of diseases characterized by out-of-control and involving abnormal cell growth with the potential to invade or spread to other parts of the body. There are different types of cancer which arise from different types of cell.

Causes

There are majority of cancers are due to environmental factors and some cases are due to inherited genetics. It is not possible to prove that what caused a cancer in any individual, because most cancers have multiple possible causes.

1) Chemicals

Smoking is dangerous for our body. The tobacco usage includes many forms of cancer, particularly stomach cancer, head cancer, neck cancer, kidney cancer, lung cancer and breast cancer and tobacco is still uncertain. Drinking alcohol can more affected to increase the risk of cancer.

2) Diet and exercise

Diet, physical inactivity, and exercise are related to increase of cancer deaths. Physical inactivity is not only effect on body weight but believe that it’s contribute to cancer risk in our body and also negative effects on Immune system. Apart from physical inactivity, that diet can also reduce cancer risk. Healthy diet can help to lower risk of other diseases.

3) Viruses

Viruses can help to cause some cancers. Many viruses can reduce genetic changes in cell of our body that make them more likely to become cancerous. There are some examples of viruses that are link to cancers, such as hepatitis B and C viruses can cause liver cancer and Epstein – Barr virus can cause Lymphomas.

4) Infection
Some of cancer deaths are related to bacterial infectious diseases. A virus that can cause cancer is also called an oncovirus. Proportion of varies in different regions of the world. Bacterial infection can increase the risk of bowel cancer or stomach cancer.

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