CA199 is glycosyl antigen 199, which belongs to oligosaccharide tumor-associated antigen, a glycolipid on the cell membrane, and is a tumor marker with the highest sensitivity to pancreatic cancer.
The normal value of CA199 varies in different hospitals and different laboratories. The value of CA199 is lower than normal, which generally has no special significance; the value of CA199 is mildly higher than the upper limit of normal, which often suggests benign diseases, such as cholecystitis, hepatitis, pneumonia, renal failure, etc. The obvious increase of CA199 suggests that there is a higher possibility of malignant tumors, such as pancreatic cancer, colorectal cancer, etc. The examination of CA199 is usually done by a doctor.
CA199 test is usually conducted by drawing venous blood, the day before drawing blood to avoid fatigue, it is best not to participate in strenuous exercise, avoid alcohol, limit high-fat, high-protein diet, no need for fasting.
If CA199 is found to be elevated, go to the hospital in time, and the doctor will usually make the final diagnosis by combining with imaging, pathology and other tests. Patients should keep a good attitude and actively cooperate with the doctor for further diagnosis and treatment.