The cause of cancer is usually not known with certainty because the causes of cancer can be a combination of a set of factors, genetic and environmental. But there are several factors thought to increase cancer risk, 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 is likely inherited in families of breast cancer, ovarian cancer, skin cancer and colon cancer. For example, a woman's risk for 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 can reach very long distances. Example, survivors of the atomic bombs on Hiroshima and Nagasaki in World War II, at high risk of cancer of blood cells, such as leukemia.
Food factors that contain chemicals.
Food also can be another important risk factor causes cancer, especially cancers of the digestive tract. Examples of foods that can cause cancer are:
- Smoked and pickled foods (in pickled form) increases the risk of gastric cancer
- Drinks that contain alcohol cause higher risk for esophageal cancer.
- Substance of food coloring
- Heavy metals such as 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 a virus that can cause cancer, among others:
- Papilloma virus causes genital warts (genital) presumably is one of the causes of cervical cancer in women.
- Cytomegalovirus causes Kaposi's sarcoma (cancer of the blood vessel system is characterized by red skin lesions)
- Hepatitis B virus can cause liver cancer.
- Epstein - Bar (in Africa) causes Burkitt's lymphoma, whereas in China this virus causes cancer of the nose and throat. This occurs because of environmental and genetic factors.
- Retro Virus in humans such as the HIV virus causes lymphomas and other blood cancers.
Heredity
Genetic factors cause some families have a higher risk of developing certain cancers when compared with other families. The type of cancer is likely inherited in families of breast cancer, ovarian cancer, skin cancer and colon cancer. For example, a woman's risk for 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 can reach very long distances. Example, survivors of the atomic bombs on Hiroshima and Nagasaki in World War II, at high risk of cancer of blood cells, such as leukemia.
Food factors that contain chemicals.
Food also can be another important risk factor causes cancer, especially cancers of the digestive tract. Examples of foods that can cause cancer are:
- Smoked and pickled foods (in pickled form) increases the risk of gastric cancer
- Drinks that contain alcohol cause higher risk for esophageal cancer.
- Substance of food coloring
- Heavy metals such as 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 a virus that can cause cancer, among others:
- Papilloma virus causes genital warts (genital) presumably is one of the causes of cervical cancer in women.
- Cytomegalovirus causes Kaposi's sarcoma (cancer of the blood vessel system is characterized by red skin lesions)
- Hepatitis B virus can cause liver cancer.
- Epstein - Bar (in Africa) causes Burkitt's lymphoma, whereas in China this virus causes cancer of the nose and throat. This occurs because of environmental and genetic factors.
- Retro Virus in humans such as the HIV virus causes lymphomas and other blood cancers.
Infection
- The parasite Schistosoma (bilharzia) may cause bladder cancer due to chronic irritation of the bladder. However, other chronic irritants do not cause cancer.
- Infection Clonorchis that causes cancer of the pancreas and biliary tract.
- Helicobacter pylori is a bacterium that may be the cause of stomach cancer, and these bacteria suspected to cause injury and chronic inflammation of the stomach so as to increase the 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.
Hormonal imbalance
Function of the hormone estrogen stimulates the growth of cells which tend to encourage the occurrence of cancer, while progesterone protects the occurrence of excessive cell growth. - There is a tendency that an excess of hormones estrogen and progesterone deficiency leading to 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 the balance of the body cell. Constant state of tension which can affect the cells, where cells become hyperactive and the changing nature of malignant cancer causing.
Free radicals
- Free radicals are an atom, group of atoms, or molecules that have unpaired electrons that are free dilingkaran outside. Source - the source of free radicals which are:
A. 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. Excessive production of free radicals on overeat when we (have an impact on the metabolic processes), or when we are in a state of excessive stress, whether physical stress, psychological, and biological.
- The parasite Schistosoma (bilharzia) may cause bladder cancer due to chronic irritation of the bladder. However, other chronic irritants do not cause cancer.
- Infection Clonorchis that causes cancer of the pancreas and biliary tract.
- Helicobacter pylori is a bacterium that may be the cause of stomach cancer, and these bacteria suspected to cause injury and chronic inflammation of the stomach so as to increase the 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.
Hormonal imbalance
Function of the hormone estrogen stimulates the growth of cells which tend to encourage the occurrence of cancer, while progesterone protects the occurrence of excessive cell growth. - There is a tendency that an excess of hormones estrogen and progesterone deficiency leading to 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 the balance of the body cell. Constant state of tension which can affect the cells, where cells become hyperactive and the changing nature of malignant cancer causing.
Free radicals
- Free radicals are an atom, group of atoms, or molecules that have unpaired electrons that are free dilingkaran outside. Source - the source of free radicals which are:
A. 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. Excessive production of free radicals on overeat when we (have an 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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