Cancer Causes

The cause of cancer is usually not known for certain because the causes of cancer can be a combination of a set of factors, genetic and environmental. But there are several factors that allegedly increase the risk of cancer, as follows:


Heredity
Genetic factors cause some families have a higher risk of developing certain cancers when compared with other families. The type of cancer tends to run in families is breast cancer, ovarian cancer, skin cancer and colon cancer. For example, a woman's risk of developing cancer increased 1.5 s / d 3 times if the mother or sister had breast cancer.

Environmental Factors
- Cigarette smoking increases the risk of lung cancer - lung, mouth, larynx (vocal cords), and bladder.
- Ultraviolet light from the sun
- Ionizing radiation (which is carcinogenic) is used in x-ray beam generated from nuclear power plants and atomic bombs that could reach a great distance. For example, people who survived the atomic bombs on Hiroshima and Nagasaki in World War II, the high risk of developing cancer of blood cells, such as leukemia.


Factors Foods that contain chemicals.
Food can also be another important risk factor causes cancer, especially cancers of the digestive tract. Examples of foods that can cause cancer are:

- Foods that are smoked and pickled (in the form of pickles) increase the risk of gastric cancer
- Drinks that contain alcohol cause higher risk for esophageal cancer.
- Substance food coloring
- Heavy metals like mercury are often found in contaminated seafood such as shellfish, fish, etc..
- A variety of foods (sweet, flour) are processed in excess.

Virus
And suspected virus that can cause cancer, among others:
- Papilloma virus causes genital warts (genital) presumably is one cause of cervical cancer in women.
- Cytomegalovirus causes Kaposi's sarcoma (cancer of the blood vessel system which is characterized by red skin lesions)
- Hepatitis B can cause liver cancer.
- Epstein - Bar (in Africa) causes Burkitt's lymphoma, whereas in China these viruses cause cancer of the nose and throat. This occurs because of environmental and genetic factors.
- Retro Virus in humans such as the HIV virus causes lymphoma and other blood cancers.

Infection
- Parasites Schistosoma (bilharzia) may cause bladder cancer due to chronic irritation of the bladder. But other causes of chronic irritation does not cause cancer.
- Infection by Clonorchis that cause pancreatic cancer and biliary tract.
- Helicobacter pylori is a bacteria that may be the cause of gastric cancer, and allegedly this bacterium causes gastric injury and chronic inflammation resulting in increased speed of the cell cycle.


Behavioral factors
- The behavior in question is smoking and eating foods that contain lots of fat and cured meats are also drinkers of alcoholic beverages.
- Behavior that is sexual intercourse early age and frequently changing sexual partners.

Disruption of hormonal balance
The hormone estrogen stimulates cell growth function that tends to encourage the occurrence of cancer, while progesterone protects the occurrence of excessive cell growth. - There is a tendency that an excess of estrogen and progesterone deficiency causes an increased risk of breast cancer, cervical cancer, uterine cancer and cancer of the prostate and testicles in men.

Psychological factors, emotional
- Stress can cause severe disruption to the company balance the body's cellular. Continuous state of tension that can affect the cells, where cells become hyperactive and changed character to become malignant, causing cancer.

Free radicals
Free radical is an atom, group of atoms, or molecules that have unpaired electrons that are free dilingkaran outside. Source - the source of free radicals which are:

1. Free radicals are formed as byproducts of metabolic processes.
2. Free radicals enter the body in the form of chemical toxins from food, drinks, polluted air, and ultraviolet rays from the sun.
3. Free radicals are produced in excess when we overeat (impact on the metabolic processes) or when we are in a state of excessive stress, whether physical stress, psychological, and biological.

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