Cancer, is also called the malignant tumor, relative has the benign tumor. The tumor refers to organism, in each kind sends under the lump factor function, the partial organization's cell unusual proliferation forms partial tumour. The benign tumor easy to eliminate cleanly, generally does not shift, does not recur, to organ, organization only then extrusion and choking action. But the malignant tumor may also disorganize, organ's structure and the function, causes necrosis hemorrhage merge infection, the patient is possible as a result of the organ function failure to die finally. the cancer pathological change's Fundamental unit is a cancer cell. After human body cell aging death, will have the newborn cell to substitute for it, will maintain organism function. Obviously, the human body major part cell may the proliferation, but this proliferation has the limit, but cancer cell's proliferation is without limits, this causes patient in vivo the nutrients by the mass consumptions. At the same time, the cancer cell can also release many kinds of toxin, causes the human body to have a series of symptoms. If the discovery and the treatment are not prompt, it also rotatable transfers to whole body each place growth to reproduce, finally causes the human body to become emaciated, incapable, anemia, to have a poor appetite, to give off heat and the internal organs function suffers injury and so on. human body each spot possibly suffers cancer violation nearly. Originally, human body this living thing machine run flawlessly, however cancer changed this situation, its duty is destroys. If continues, will burn out the human body. But, the tumor does not look like the virus, is not in vitro intruder, its ingredient and the Normal tissue are the same, therefore organism is unable to carry on the recognition immunity. 10 related cancer's digital the 1, human body altogether has 100 many kinds of cancers, may occur in body's various spots.

2nd, in 2005 the world altogether has 7,600,000 cancer cases. And causes the dead occupies the world casualty 58,000,000 people 13%

3rd, 70% cancers occur in the low income developing country.

4th, in the world male the common cancer is: The lung cancer, the stomach cancer, liver cancer, ties/Rectal Cancer and esophagus cancer.

in the 5, females the common cancer is: Breast cancer, the lung cancer, the stomach cancer, ties/Rectal Cancer and the carcinoma of cervix.

the 6, smoking are in the world cause cancer's most main cause of disease.

7th, in the world 1/5 cancer is causes by the chronic infection, if the papilloma virus causes the carcinoma of cervix; The hepatitis B virus causes liver cancer.

 the 8, 1/3 cancers may discover and the suitable treatment through the early physical examination unify obtain the healing finally.

9th, all cancer case may the application modern knowledge carry on the ache control and, in cancer later period obtains in the treatment through the psychological concern the help.

10th, 40% cancers are can through the adjustment daily behavior prevention, is mainly through ways and so on no-smoking, healthy meals, physical training, prevention infection realizes