Cause of cancer usually can not be known for certain because the causes of cancer can be a combination of a set of factors, genetic and environmental. However there are several factors that allegedly increase the risk of cancer, as follows:
* Factor descent
Genetic factors cause some families are at higher risk for certain cancers when compared with other families. Type of cancer that tends to run in the family is breast cancer, ovarian cancer, skin cancer and colon cancer. For example, the cancer risk for women increased 1.5 s / d 3 times if his mother or sister had breast cancer.
* Environmental Factors
- Smoking cigarettes increases the risk of lung cancer – lung, mouth, larynx (vocal cords), and bladder.
- Ultraviolet rays from the sun
- Ionizing radiation (which is carcinogenic) is used in x-ray beam generated from nuclear power plants and atomic bombs that can reach very long distances. For example, people who survived the atomic bombs on Hiroshima and Nagasaki in World War II, a high risk of cancer of blood cells, such as leukemia. (more…)
The main cause of cervical cancer is