Higher Risk

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Some people and certain nations or communities are more prone to develop cancer. They are said to have a higher risk for developing cancer. It seems that causation of cancer is either due to:

Inherited factors in a person or internal factors
External factors , specific factors that exist in a community or environment and a person is exposed to them

Hereditary factors

are known to contribute to development of following cancers:

External Factors:

Self imposed:

Cigarette Smoking, causing Lung cancer

Excessive Sun exposure, causing Skin cancer and Melanoma

Environmental factors causing higher incidence of

Stomach cancer in Japan

Gestational Trophoblastic Disease in Taiwan

Esophageal Cancer in Northern Iran

Radiation Exposure

Effect of Social class on cancer risk:

Infections tend to predispose people of lower social classes to cancer. In many countries, women of lower social classes tend to have higher rates of Uterine Cervix cancer, which is linked to a virus. Encounter with prostitutes, who may be carriers of this virus, can transmit this infection to men and subsequently to others. World wide, people in lower social classes have higher rates of infection from the organism Helicobacter- pylori, which could contribute to causation of stomach cancer.