Cancer is a group of over 200 different infections in which abnormal cells multiply uncontrollably, damaging body tissues or functions. Cancer can constitute in almost any place in the body and each cancer is labeled for the tissue type or organ in which it begins.
The most familiar types of cancer (other than basal cell skin cancer and squamous cell skin cancer) are breast cancer, lung cancer, prostate cancer, colon and rectal cancer, and melanoma.
Cancer has various symptoms and is treated in various ways depending on the type. Treatments comprise surgery, chemotherapy, radiation, and immunotherapy.
One in two men and one in three women are required to develop cancer (not including skin cancer) over the course of a lifetime.
Cancer develops when there are changes to the DNA within a cell that enable it to grow out of control. The cancerous cells can then crowd out normal cells or occupy body tissues. Radiation, cancer-causing substances, infections, and your genetic makeup can increase your risk of mutations that result in cancer.
Most people don’t realize that cancer is preventable in many cases. Learning what causes cancer and what the risk factors are is the first step in cancer prevention
American Cancer Society and the National Cancer Institute, the most general causes and risk factors of cancer are:
1. Smoking and tobacco use
3. Lack of physical activity
Being overweight or obese
5. Sun exposure
6. Radiation exposure
7. Virus infections and other infections
8. Exposure to cancer-causing substances
9. Family history and genetics
10. Chronic inflammation