Blood test for CA-72-4: a marker for monitoring cancer diseases
General characteristics of the marker CA-72-4
CA-72-4 (Cancer Antigen 72-4) is a tumor-associated glycoprotein, specifically tumor-associated glycoprotein 72 (TAG-72), which belongs to the mucin-like proteins. Normally, it practically does not circulate in the blood, but its expression increases significantly in a number of malignant processes, especially in the case of adenocarcinomas of the gastrointestinal tract and ovaries.
Who and when is this test prescribed?
The CA-72-4 test is usually prescribed for:
Patients with suspected stomach, colon, ovarian cancer.
After the diagnosis is made - for monitoring the effectiveness of chemotherapy or surgical treatment.
For timely detection of relapse in patients with already diagnosed oncological pathology.
Less often - as part of an extended examination with nonspecific gastroenterological symptoms.
Preparation for analysis
Pick-up time: The analysis is performed on an empty stomach, preferably in the morning.
Avoid: It is recommended to refrain from alcohol, fatty foods, and intense physical activity 24 hours before the test.
Medications: Tell your doctor about all medications you are taking, as some of them may affect the test results.
Normal values and interpretation of results
| CA-72-4 level (IU/ml) | Interpretation |
|---|---|
| 0 – 6.9 | Norm |
| > 6.9 | Possible increase, requires additional examination |
Note: Elevated levels of CA-72-4 do not always indicate the presence of a malignant process. It can be elevated in some benign conditions, such as inflammatory diseases of the gastrointestinal tract, liver, or ovaries.
Advantages and limitations of the analysis
Advantages:
High specificity for some types of cancer, especially stomach and ovarian.
Ability to monitor treatment effectiveness and detect relapses.
Limitation:
Low sensitivity in early stages of the disease.
False-positive results are possible for some benign conditions.
Combination with other tumor markers
To increase diagnostic accuracy, the CA-72-4 test is often combined with other tumor markers:
CA-72-4 + CEA: For the diagnosis and monitoring of stomach and colon cancer.
CA-72-4 + CA-125: For the detection and monitoring of ovarian cancer.
CA-72-4 + CA-19-9: For the diagnosis of pancreatic and biliary tract tumors.
Recommendations for patients
Don't panic if the reading is above normal. This is just an indicator that needs confirmation.
Regularity: Patients with stomach cancer are recommended to undergo testing every 3–6 months after treatment.
Discuss the results only with an oncologist or gastroenterologist, do not interpret them yourself.
Director of Medi Lab Plus LLC, a doctor of the highest category. Has over 45 years of practical experience in medicine and laboratory diagnostics. Founder and head of the laboratory since 2007. More details…