The cause of cancer is typically not known with certainty 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:
1. Heredity
Genetic factors cause some families have a higher risk for certain cancers when compared to other families. The type of cancer in the family is likely inherited 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 her mother or sister had breast cancer.
2. Environmental Factors
- Cigarette smoking increases the risk of lung cancer - lung, mouth, larynx (vocal cords), and bladder.
- Ultraviolet rays from the sun
- Ionizing radiation (which is carcinogenic) used in x-ray beam generated from nuclear power plants and atomic bombs that can reach great distances. For example, survivors of the atomic bombs on Hiroshima and Nagasaki in World War II, high risk of blood cell cancers, such as leukemia.
3. Factors Foods containing chemicals.
Food can also be a risk factor for other important causes of cancer, particularly cancers of the digestive tract. Examples of the types of foods that can cause cancer are:
- Smoked and pickled food (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 such as mercury are often found in contaminated seafood such as shellfish, fish, etc..
- Variety of food (sweet, flour) are processed in excess.
4. Virus
Viruses that can cause cancer and suspected include:
- 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 that is characterized by red skin lesions)
- Hepatitis B virus can cause liver cancer.
- Epstein - Bar (in Africa) causes Burkitt's lymphoma, while 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 lymphoma and other blood cancers.
5. 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 by Clonorchis causing pancreatic and bile duct cancer.
- Helicobacter pylori is a bacterium that may be the cause of gastric cancer, and suspected bacteria causing injury and chronic inflammation of the stomach resulting in increased speed of the cell cycle.
6. Behavioral factors
-The behavior in question is smoking and eating foods that contain lots of fat and meat are preserved also drink alcoholic beverages.
1. Heredity
Genetic factors cause some families have a higher risk for certain cancers when compared to other families. The type of cancer in the family is likely inherited 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 her mother or sister had breast cancer.
2. Environmental Factors
- Cigarette smoking increases the risk of lung cancer - lung, mouth, larynx (vocal cords), and bladder.
- Ultraviolet rays from the sun
- Ionizing radiation (which is carcinogenic) used in x-ray beam generated from nuclear power plants and atomic bombs that can reach great distances. For example, survivors of the atomic bombs on Hiroshima and Nagasaki in World War II, high risk of blood cell cancers, such as leukemia.
3. Factors Foods containing chemicals.
Food can also be a risk factor for other important causes of cancer, particularly cancers of the digestive tract. Examples of the types of foods that can cause cancer are:
- Smoked and pickled food (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 such as mercury are often found in contaminated seafood such as shellfish, fish, etc..
- Variety of food (sweet, flour) are processed in excess.
4. Virus
Viruses that can cause cancer and suspected include:
- 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 that is characterized by red skin lesions)
- Hepatitis B virus can cause liver cancer.
- Epstein - Bar (in Africa) causes Burkitt's lymphoma, while 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 lymphoma and other blood cancers.
5. 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 by Clonorchis causing pancreatic and bile duct cancer.
- Helicobacter pylori is a bacterium that may be the cause of gastric cancer, and suspected bacteria causing injury and chronic inflammation of the stomach resulting in increased speed of the cell cycle.
6. Behavioral factors
-The behavior in question is smoking and eating foods that contain lots of fat and meat are preserved also drink alcoholic beverages.
-Sexual behavior ie intercourse early age and frequently changing sexual partners.
7. Hormonal balance disorders
7. Hormonal balance disorders
The hormone estrogen serves to stimulate the growth of cells which tend to encourage cancer, while progesterone protects the excessive cell growth. - There is a tendency for excess estrogen and progesterone deficiency causes an increased risk of breast cancer, cervical cancer, cervical cancer and cancers of the prostate and testicles in men.
8. Psychological factors, emotional
Severe stress can cause the body's cellular balance disruption. Constant state of tension can affect the cell, where cells become hyperactive and change the nature of a malignant cancer causing.
9. Free radicals
Free radical is an atom, group of atoms, or molecules that have an unpaired electron in circles free exterior. Sources - sources of free radicals are:
8. Psychological factors, emotional
Severe stress can cause the body's cellular balance disruption. Constant state of tension can affect the cell, where cells become hyperactive and change the nature of a malignant cancer causing.
9. Free radicals
Free radical is an atom, group of atoms, or molecules that have an unpaired electron in circles free exterior. Sources - sources of free radicals are:
- Free radicals are formed as a byproduct of metabolism.
- Free radicals enter the body in the form of chemical toxins from food, drinks, polluted air, and ultraviolet rays from the sun.
- Free radicals are produced in excess when we eat too much (impact on metabolic processes) or if we are in a state of excessive stress, whether the stress is physical, psychological, and biological.
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