What are the main cancer detection tools available today? Is the accuracy rate high? At present, cancer detection is mainly through blood testing of tumor markers, in addition, there are some targeted tests for specific tumors, such as the recently discussed breast cancer gene test. The reason why people are so interested in cancer tests is undoubtedly because of the fear of cancer, and nowadays, people want to detect their chances of cancer in advance so that they can carry out early intervention or treatment. However, these so-called cancer tests actually have very little effect on the early warning of cancer, because even if the test results indicate a high probability of cancer, it cannot be said that one will definitely develop cancer. Just like the famous Hollywood actress Angelina Jolie who was tested for breast cancer. Jolie has a high probability of breast cancer, but it does not mean that she will definitely get breast cancer in the future. People’s fear of cancer is understandable, but excessive superstition in cancer testing will only cause excessive psychological pressure or psychological panic. After all, cancer is never determined by the results of cancer tests alone. For example, there are some false negatives and false positives in the tumor marker test related to breast cancer, which means that even if some people are diagnosed with breast cancer, the test results show that the probability of having cancer is not high. Therefore, cancer tests should not be used as a means of cancer screening, let alone as a criterion to confirm cancer diagnosis. Nowadays, there are some broad-spectrum tumor marker tests in the market, saying that one can detect the probability of cancer at home in advance. I wonder if such tests are reliable? The so-called broad-spectrum tumor marker test is commonly known as a cancer test without directionality, and the test result can only indicate whether one has cancer or not, but not a specific cancer test. For this kind of test, it is not recommended for people to do it blindly. He said that if you really have high-risk factors, such as a family member with a history of cancer, you can go to a specialized oncology hospital for regular checkups, rather than testing yourself at home and then blindly speculating. “Generally speaking, such tests can only be judged simply from negative and positive, and once the result is found to be positive, it will cause psychological panic.” There is no need to necessarily do cancer test for non-cancer high risk people. If tumor marker test is indeed done during physical examination, the result must also be interpreted and judged by a professional doctor, because some chronic inflammation sometimes also affects the test result. At present, many cancer tests are targeted at specific cancers, such as digestive tract cancer, breast cancer, etc., which are all targeted tests. In addition, the diagnosis of cancer cannot be determined by the tumor marker test alone, but must be combined with other imaging tests to confirm the final diagnosis. “At present, the main role of testing related tumor markers is to evaluate the treatment effect of cancer patients and the detection of cancer recurrence, that is, it is not very useful for early diagnosis of cancer, and cancer diagnosis of non-high risk people.”