Cancer is a malignant tumor originated from epithelial tissue. Malignant tumors are immature in differentiation and rapid in growth, easily infiltrate surrounding tissues or have distant metastasis, all of which will affect human life expectancy if not intervened, therefore, there are no top 10 cancers that do not affect life expectancy clinically. However, for cancers with relatively low malignancy and early detection, they can be cured clinically after treatment, and some of them can achieve long-term survival without recurrence. Most of the thyroid cancers are papillary thyroid cancers with good prognosis and timely treatment. Survival rate can reach more than 90%, with high treatment safety and less impact on life expectancy; 5. Other cancers: such as rectal cancer, colon cancer, nasopharyngeal cancer, testicular cancer, etc. If the stage is very early, the prognosis is still good after early treatment, and patients can obtain a longer survival period. Although the above cancers can have a better prognosis, early diagnosis and early treatment are the important foundation to ensure a good prognosis. The mortality rate of untreated cancers is very high, so patients should not relax their vigilance or give up treatment.