What are Tumor Markers?
Tumor markers are substances found in blood, urine, or tissues. Often, these substances are made by cancer cells. Sometimes, healthy cells can also make them. However, high levels may point to certain types of cancer. Many people ask, “what are tumor markers?” because they hear about them during cancer tests. In fact, doctors use tumor markers to help find, diagnose, or monitor cancer. According to the World Health Organization (WHO), tumor markers can be helpful, but they are just one part of the bigger picture.
Common Types of Tumor Markers
There are many types of tumor markers. Each one is linked to certain cancers. For example, some are found in blood, while others are found in urine or tissue samples. Here are some common tumor markers:
Additionally, new tumor markers are being studied all the time. Not every cancer has a known marker.
How Tumor Markers Are Used in Diagnosis and Monitoring
Doctors use tumor marker tests in several ways. First, they may help find out if cancer is present. Next, they can help check if treatment is working. For example, if a tumor marker level drops after treatment, it may mean the cancer is shrinking. On the other hand, rising levels might show the cancer is growing or coming back. However, tumor markers are rarely used alone. Doctors often combine them with scans and other tests for a full picture.
Limitations and Risks of Tumor Markers
While tumor markers can be helpful, they have limits. Sometimes, non-cancer conditions can raise tumor marker levels. For example, infections or inflammation may cause higher results. Also, not all cancers make tumor markers. Therefore, a normal result does not always mean there is no cancer. Because of these reasons, doctors use tumor marker accuracy along with other tests. The Centers for Disease Control and Prevention (CDC) notes that tumor marker tests are not perfect and should not replace regular cancer screening.
How Tumor Marker Tests Are Performed
Tumor marker tests are simple for most people. Usually, a blood sample is taken from your arm. Sometimes, urine or tissue samples are needed. After the sample is collected, it goes to a lab for testing. Results may take a few days. In some cities, you can find tumor marker tests at local hospitals or clinics. Always follow your doctor’s instructions before and after the test.
Interpreting Tumor Marker Results
When you get your results, it is normal to have questions. High levels do not always mean cancer. Likewise, low levels do not always mean you are cancer-free. Doctors look at your results along with your symptoms, scans, and other tests. Sometimes, they may repeat the test to check for changes over time. Therefore, it is important to talk to your doctor about what your results mean for you.
Frequently Asked Questions about Tumor Markers
When to Consult a Doctor
If you have symptoms that worry you, talk to your doctor. For example, unexplained weight loss, pain, or changes in your body may need a check-up. Even if you feel fine, regular cancer screening is important for some people. If you have questions about tumor marker tests or cancer blood tests, your healthcare provider can guide you. Early advice can make a big difference.
Consult a healthcare professional Dr. Rajendra Thigale at Ashirvad Pathology laboratory for personalized advice about tumor markers and cancer screening.