1, such as CA50 (broad-spectrum tumor marker): it can be elevated in benign obstructive jaundice, substantial liver damage, gastritis, pneumonia, and is effective in symptomatic treatment; cancer patients can be enumerated to take zoster for two months can reduce this index. 2.For example, CA125 (ovarian cancer-related antigen): pelvic inflammatory disease and pneumonia can cause it to exceed the upper limit, and antibiotics can lower it. 3, such as CA153 (breast cancer-related antigen): it can also be elevated in benign breast lesions. 4, such as CA199 (pancreatic and intestinal cancer-related antigen): CA 19-9 levels in pancreatic, hepatobiliary, gastric and colorectal cancers are 683, 535, 279 and 115 times higher than the normal average value respectively; low concentration increase and transient increase are seen in chronic pancreatitis, gallstone disease, cirrhosis, renal insufficiency and diabetes. As long as it is relatively stable, even if it exceeds the upper limit (normal value ≤ 37k U / L), it does not matter, because the normal value refers to the average level of 95% of the population, it may happen that you are not the average person. 5.For example, CA724 (gastric cancer antigen): 1% of benign gastric disease indicators are elevated, 42.6% of gastric cancer indicators are elevated, the equipment and reagents will affect the results, you can change the hospital to check again. 6.For example, NSE (neuroendocrine tumor, small cell lung cancer), improperly handled blood samples can be abnormal, and it is fine to re-blood. 7.The literature shows that there is some connection between lung cancer and NSE, CA153, CA125, CA50 and other indicators, but there is no inevitable relationship, even if the name is “lung cancer-related tumor indicators”, what you need to do is to review it in three months, if it remains unchanged, you can ignore it, if it rises, use the above methods, if it rises rapidly, you need to check the whole body. PET may be the choice of high-risk people or those who are anxious, and there are also people who have gastroscopy, colonoscopy, liver CT, lung CT and bone scan to the end.