Cancer Antigen 15-3 (CA15-3)

CA15-3 is an antigen associated with malignant tumors such as breast cancer and is the most important specific marker for breast cancer. CA15-3 is significantly elevated in 30%-50% of breast cancer patients, and its content is closely related to the therapeutic effect. Cancer antigen 15-3 is an auxiliary diagnostic indicator for breast cancer, but it is not sensitive in the early stage of breast cancer. The early positive rate was 60%, and the metastatic breast cancer positive rate was 80%. Cancer antigen 15-3 was also followed up for postoperative monitoring of tumor recurrence and metastasis. Basic Information Specialist classification: Oncology examination classification: immune examination Applicable gender: whether men and women apply fasting: fasting Tips: Before eating, the diet is light, alcohol is forbidden, and good sleep is guaranteed. Check for an empty stomach in the morning. Normal value The radioimmunoassay is less than 25,000 U/L. Clinical significance Cancer antigen 15-3 is an auxiliary diagnostic indicator for breast cancer, but it is not sensitive in the early stage of breast cancer. The early positive rate was 60%, and the metastatic breast cancer positive rate was 80%. Cancer antigen 15-3 was also followed up for postoperative monitoring of tumor recurrence and metastasis. Increased in breast cancer, lung cancer, colon cancer, cervical cancer and so on. The positive rate of non-malignant tumors such as breast and ovary is generally less than 10%. High results may be diseases: breast cancer, cervical cancer, lung cancer, colon cancer precautions First, the precautions before blood draw 1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. 2. After 8 pm on the day before the medical examination, you should start fasting for 12 hours to avoid affecting the test results. 3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection. Second, should pay attention after blood draw 1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma. 2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended. 3, after the blood draw symptoms of fainting such as: dizziness, vertigo, fatigue, etc. should immediately lie down, drink a small amount of syrup, and then undergo a physical examination after the symptoms are relieved. 4. If there is localized congestion, use a warm towel after 24 hours to promote absorption. 3. Please inform the doctor about the recent medication and special physiological changes before the test. Inspection process The venous blood is taken, the serum is separated, and the tumor immunoassay is performed by radioimmunoassay, enzyme-linked immunosorbent assay or the like. Not suitable for the crowd Those without examination for appropriate symptoms should not be tested. Adverse reactions and risks 1. Infection: Pay attention to aseptic operation when collecting blood, avoid contamination of water and other parts at the blood collection site to avoid local infection. 2, bleeding: after the blood is given a full compression time, especially coagulopathy, bleeding tendency, to avoid local subcutaneous oozing, bruising and swelling.

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