Tumors may be found in every part of the human body, with tumors in internal organs being the most common, and tumors in the skin, mouth, and limbs. The common malignant tumors in Chinese men are lung cancer, stomach cancer, liver cancer, bladder cancer, leukemia, lymphoma, prostate cancer, etc.; the common malignant tumors in Chinese women are breast cancer, lung cancer, rectal cancer, liver cancer, ovarian cancer, endometrial cancer, etc.; the most common clinical tumors are lung cancer, esophageal cancer, stomach cancer, liver cancer, etc. Therefore, regular medical checkups are very helpful to detect tumors for further treatment, while simple examination of a certain area cannot detect whole body tumors.