"What is CA19-9 and Its Significance as a Tumor Marker?"

Understanding CA199: A Key Tumor Marker in Clinical Practice

CA199, or Carbohydrate Antigen 199, is a prevalent tumor marker used in the detection and monitoring of certain types of cancer. As a tumor-associated antigen, it primarily serves in the diagnosis and surveillance of digestive system tumors such as pancreatic, biliary, and gastric cancers. It is essential to comprehend its definition, functions, normal range, applicable cancer types, detection methods, and influencing factors. Based on individual circumstances, medical advice should be followed for appropriate treatment measures. Details are outlined below:

1. Definition and Functions

CA199, abbreviated from Carbohydrate Antigen 199, is a tumor-associated antigen primarily utilized for the detection and monitoring of digestive system tumors, including pancreatic, biliary, and gastric cancers. While CA199 testing is commonly employed for initial screening and treatment monitoring, it should not be solely relied upon for definitive diagnosis and should be complemented with other examinations.

2. Normal Range

Under normal conditions, the concentration of CA199 in the blood should be below 37U/mL. If this threshold is exceeded, further examination is necessary to determine the presence of a tumor. Regular health check-ups and prompt medical attention upon elevated CA199 levels are recommended for further investigation.

3. Applicable Cancer Types

CA199 is primarily used in the detection of digestive system tumors, including pancreatic, biliary, gastric, and colorectal cancers. Patients with high-risk factors for these cancers should undergo regular CA199 testing.

4. Detection Methods

CA199 detection is typically performed through a simple and rapid blood test, with results usually available within a few days. To ensure accuracy, blood tests should be conducted in reputable hospitals or testing facilities.

5. Influencing Factors

Elevated CA199 levels may be influenced by factors such as inflammation and benign diseases, not necessarily indicative of malignancy. In cases of abnormally high CA199 levels, a comprehensive assessment of the patient's condition should be conducted in conjunction with other diagnostic tools.

CA199 is a crucial tumor marker in the detection and monitoring of digestive system tumors. Through regular health check-ups, timely testing, and comprehensive assessments, early detection and monitoring of tumor progression can be achieved. If CA199 levels are elevated or symptoms persist, prompt medical attention is essential to obtain professional medical assistance.