In our daily medical work, we often encounter false positive syphilis tests in elderly people who do not have any clinical symptoms, usually live a simple and cautious life, and have no bad habits, which overshadows and adds a burden to some elderly people in their old age. So why is there a false positive syphilis test? What are the chances of this happening? How should we doctors and others handle this situation properly? Syphilis is a venereal disease caused by the syphilis spirochete. In recent years, with the increase in the number of cases, the manifestations and stages of syphilis have diversified, and serological testing for syphilis has become a routine and important basis for the diagnosis of syphilis. At present, the most commonly used serological test methods at home and abroad are divided into two categories, namely non-syphilis spirochete antigen serological test and syphilis spirochete antigen serological test. The former is a routine test method, which is an experiment to detect lipid-like antibodies, such as RPR, which is commonly used now; the latter is a confirmation test method, which is an experiment to directly detect syphilis spirochetes, such as TPPA, which is commonly used now. After human infection with syphilis, two types of antibodies will be produced Antibodies, one is directly against the syphilis spirochete, and the other is against lipid-like antibodies. Antibodies against lipids are not specific because they do not directly target the syphilis spirochete. In addition to syphilis infection, the body may also produce low titers of anti-lipid antibodies as a result of other diseases and changes in physiology. These two types of antibodies are detected by the syphilis serology test performed for the diagnosis of syphilis. The RPR test, mentioned earlier, is a test to detect lipid-like antibodies. Because RPR is a test to detect lipid-like antibodies and not a test to detect anti-syphilis spirochete antibodies directly, it is non-specific. In addition to syphilis, diseases such as upper respiratory tract infection, pneumonia, active tuberculosis, rheumatic heart disease, subacute bacterial endocarditis, infectious hepatitis, cirrhosis, chronic nephritis, leptospirosis, leprosy, malaria, rheumatoid arthritis, systemic lupus erythematosus and heroin addiction can all result in a positive RPR. It is important to note that although TPPA is a specific test that directly targets syphilis spirochetes, it can also result in a 1% false positive in the general population. Diseases that are now known to cause false positive TPPA include: colon cancer, lymphosarcoma, diabetes, rheumatoid arthritis, lupus erythematosus, hepatitis C, cirrhosis, AIDS, heroin addiction, genital herpes, leprosy, and even pregnancy. In particular, it should be mentioned that the false positive rate of specific and non-specific syphilis serology in the elderly is higher than that of the normal population, generally in the range of 1% to 2%, with some reports of up to 2%. Many elderly people suffering from common medical diseases, especially those with cardiovascular disease, diabetes and leukemia who are above 70 years old testzone.com, have false positive RPR and TPPA at the same time. Not long ago, a hospital in China reported that they admitted five cases of elderly patients aged 63 to 80 years with medical diseases, suffering from coronary heart disease, cerebrovascular disease, diabetes mellitus and leukemia, respectively, during hospitalization, all had positive RPR and TPPA. Syphilis laboratory results are an important basis for the diagnosis of syphilis, but not the only one. When diagnosing syphilis, syphilis laboratory tests cannot replace a detailed history of infection and a careful physical examination. Only on the basis of the patient’s personal life history and physical examination, and comprehensive analysis of syphilis test results, can the doctor get a correct diagnosis. Therefore, please do not conceal your sexual life history when you see a doctor to provide a reliable basis for diagnosis. At the same time, the doctor should examine the patient himself or herself when treating him or her, and should not stand by and completely rely on syphilis laboratory tests, which can easily lead to missed or misdiagnosis, delaying treatment or causing unnecessary mental burden to the patient.