Cancer is a worldwide disease, but in different countries, because of different environments, different ways of life and different cultures, cancers' incidence and common cancer types are different. In China, the main cancers are esophageal cancer, gastric cancer, colon cancer, liver cancer and NPC, lung cancer, breast cancer, cervical cancer, leukemia.
Esophageal cancer: our country is high-incidence esophageal cancer country, and also is the highest esophageal cancer mortality country in the world. According to the investigation in China in the 1970s, the total mortality stay the second, followed the stomach esophagus. Since the 1980s, in cancer incidence, esophageal cancer stay the second in male incidence, and the third in female. In the early 1990s, in all sorts of cancers, esophagus mortality declined, but still relied on the top 3-4. There is a certain area distribution in esophageal. Generally speaking, the incidence of farmer is higher than city.
Stomach cancer: In the past, the stomach deaths stay the top one. In 1990s in the city was the second, but in the rural still ranks first. Morbidity is not changeable, and increased with the age.
Colorectal cancer incidence and mortality in China present an upward trend. In nationwide, it is in four to six of the most common cancers. It is rated to the environment and living habits.
Liver cancer: It is a high death disease in our country. In all cancers mortality, liver cancer rank the third, 11 million deaths every year.
Nasopharyngeal carcinoma: The south area is the high infection region, for example, Guangdong, Guangxi, Hunan and so on. Morbidity decreased along the south to north. And generally male is more than female.
Lung cancer: lung cancer is one of the most common cancers. Its morbidity is rising year after year. According to the experts prediction, lung cancer is connected with the bad living habits. And what is more, lung cancer is rated with the smoking. The earlier and more you smoke, the harm will be bigger.
Breast cancer: morbidity in our country is very low, but in recent years, breast cancer incidence is increasing. Women who suffer from breast cancer are nearly 100 times as men. Beijing, Tianjin, Shanghai and the coastal areas in China, is the area of breast cancer incidence. Mortality rate increased with age.
Cervical cancer is common in Gynecologic Cancers, and mortality rank the first. In our country, the age at onset is usually late, average 65 years old. The death rate is once the forth.
Leukemia is a kind of common hematopoietic system of malignant tumor of cancer incidence. The morbidity ranked the 5 percent in all the cancers, and usually is teen-agers.
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