In modern medicine, tumor biomarker detection has become an important part of physical examination procedures. When many people receive medical examination reports and see elevated values of tumor markers, they often feel panic and worry about whether they have cancer. However, elevated tumor markers do not necessarily equate to having cancer. Below, we will provide a detailed explanation.
1、 What are tumor markers?
Tumor markers refer to a class of substances synthesized and released by tumor cells themselves or produced by the body in response to tumor cells during the occurrence and proliferation of tumors. These substances include proteins, hormones, enzymes (isoenzymes), polyamines, and oncogene products. By detecting the levels of tumor markers in blood, urine, feces, or other bodily fluids, doctors can assist in diagnosing tumors, monitoring their condition, predicting prognosis, and observing treatment efficacy.
2、 Possible reasons for elevated tumor markers
1. Cancer
Indeed, significant elevation of certain tumor markers may be associated with the presence of specific cancers. For example, elevated levels of alpha fetoprotein (AFP) are important for the diagnosis of liver cancer, while elevated levels of carcinoembryonic antigen (CEA) may occur in various cancers such as colon cancer and gastric cancer. Carbohydrate antigen 125 (CA125) is commonly used for monitoring ovarian cancer. But it is very unscientific to determine cancer solely based on the elevation of tumor markers, as many non cancer factors can also lead to its elevation.
2. Benign diseases
Many benign diseases may also cause mild elevation of tumor markers. For example, patients with chronic hepatitis and cirrhosis often experience an increase in alpha fetoprotein, but the magnitude of the increase is usually small. Some inflammatory diseases, such as pneumonia, enteritis, etc., may cause transient elevation of carcinoembryonic antigen, etc. In addition, tumor markers such as CA125 may also increase in women during special physiological periods such as menstruation and pregnancy.
3. Physiological variations and lifestyle factors
Tumor markers may also be influenced by physiological factors such as age, gender, and menstrual cycle, as well as lifestyle factors such as living environment, dietary habits, smoking, and alcohol consumption. For example, the baseline values of some tumor markers in the elderly may be relatively high.
3、 What should I do when encountering elevated tumor markers?
1. Further examination
If elevated tumor markers are found, do not panic, the first thing to do is to undergo further examination. Doctors will arrange other relevant examinations based on the specific situation, such as imaging examinations (ultrasound, CT, MRI, etc.), endoscopic examinations (gastroscopy, colonoscopy, bronchoscopy, etc.), and may even require pathological examinations, which is the gold standard for diagnosing cancer. For example, if a high-risk group for lung cancer is found to have elevated levels of carcinoembryonic antigen during an examination, the doctor will further arrange a chest CT scan to observe whether there are any space occupying lesions in the lungs. If necessary, a lung biopsy will be performed to confirm the diagnosis.
2. Regular follow-up
If no obvious signs of cancer are found through preliminary examination and tumor markers are only mildly elevated, regular follow-up can be conducted first. Dynamically observing the changes in tumor markers has more diagnostic value. Some benign diseases lead to elevated tumor markers, which gradually return to normal as the disease is cured or the body self adjusts; If it is caused by cancer, tumor markers often show a sustained or short-term significant increase trend.
3. Comprehensive judgment based on clinical symptoms
Simply elevated tumor markers cannot diagnose cancer. Doctors will also consider factors such as the patient's clinical symptoms, family history, and lifestyle. For example, a patient with a long history of smoking, recent symptoms of unexplained cough and hemoptysis, and elevated tumor markers is relatively more likely to develop lung cancer and requires closer attention and further examination.
In short, finding elevated tumor markers during a physical examination does not necessarily mean that cancer has been diagnosed. In this situation, one should remain calm and actively cooperate with the doctor for further examination and observation, and determine the possibility of cancer based on comprehensive information. Only in this way can unnecessary panic and misdiagnosis be avoided.