Cancer Antigen 19-9 (CA19-9)

Cancer antigen 19-9 refers to a tumor marker associated with pancreatic cancer, gallbladder cancer, colon cancer and gastric cancer, and is also called a gastrointestinal related antigen. Cancer antigen 19-9 has higher sensitivity and better specificity for pancreatic cancer, and its positive rate is between 85% and 95%, and it decreases with the improvement of the condition after surgery. Basic Information Specialist classification: Oncology examination classification: immune examination Applicable gender: whether men and women apply fasting: fasting Tips: Before the examination, the diet is light and alcohol is prohibited. Check for an empty stomach in the morning. Guarantee a good night's sleep. Normal value The radioimmunoassay is less than 37,000 U/L. Clinical significance Serum cancer antigen 19-9 can be used as an auxiliary diagnostic indicator for malignant tumors such as pancreatic cancer and gallbladder cancer. In the embryonic stage, the pancreas, gallbladder, liver, intestine and other tissues have such antigens, and the content in normal human tissues is very low; in the digestive tract malignant tumors, especially in the serum of patients with pancreatic cancer and gallbladder cancer, the content of cancer antigen 19-9 is obvious. Increased, but the value of early diagnosis is not large, mainly as an indicator of disease monitoring and predicting recurrence. In addition, differential diagnosis of digestive tract diseases (such as pancreatic cancer and pancreatitis, gastric cancer and gastric ulcer) also has a certain value. Increased in pancreatic cancer, gallbladder cancer, stomach cancer, colon cancer, liver cancer, etc.; acute pancreatitis, cholecystitis, hepatitis, etc. also have varying degrees of elevation. High results may be diseases: gallbladder cancer, pancreatic cancer, sigmoid colon cancer, acute pancreatitis, hepatitis, cholecystitis, liver cancer, colon cancer 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 Blood samples were taken immediately after intravenous collection for tumor immunoassay. Not suitable for the crowd Those who do not have tumors and other suitable conditions 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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