A large number of diseases have been submitted to people in the present time, but cancer is not one of them. How much do you know about cancer, a familiar and unfamiliar term? 1.Lung cancer is the first in the incidence of malignant tumors, with about 600,000 new cases each year. 2.Breast cancer is the first female incidence Breast cancer is the first female incidence, with about 210,000 new cases each year. People whose immediate family members have breast cancer have a 30% higher risk of developing breast cancer themselves. If the average life expectancy is 74 years old, the chance of developing malignant tumor is 22%. 3. Suggestion: pay attention to the health examination of tumor after 40 years old. 4. Comparison between urban and rural areas The incidence rate in urban and rural areas is higher than that in rural areas, while the mortality rate is higher in rural areas than that in urban areas. According to the information, the number of cancer villages in China should be more than 247, covering 27 provinces in mainland China. The common feature of these cancer villages is that there must be highly polluting heavy chemical enterprises nearby. 5.Cancer condition data In 2012, there were 14 million new cancer cases and 8.2 million deaths worldwide. Among them, China added 3.07 million cancer patients (about 21.9% of the world) and about 2.2 million people died (about 26.8% of the world). The overall incidence of cancer is still on the rise, and if early diagnosis and treatment can be achieved, the cure rate of some cancers can reach over 90%. Symptoms of cancer prevention: hard lumps in the breast (both men and women), inexplicable pain, lymph node changes, fever, inexplicable weight loss, persistent abdominal pain with depression, fatigue, persistent cough, difficulty swallowing, skin changes, abnormal bleeding.