Cancer is a serious disease that kills many people. Although medical technology has made great progress But we still see cancer patients who come back after treatment is finished Today, we will answer that question. Why has the cancer already been treated? To come back again? Answers from experts will help resolve your concerns.
Causes of cancer recurrence
- remaining cancer cells
Although treatments such as surgery, chemotherapy, or radiation can remove much of the cancer, But there are also small cancer cells. that remain in the body and cannot be detected These cells can grow and become cancerous again.
- Spread of Cancer Cells (Metastasis)
Cancer cells can spread to other parts of the body through the blood or lymphatic system. This discharge may not be detected during the initial treatment period. But it can grow and develop cancer in a new area.
- New Changes
Cancer cells can migrate and grow into new cells that are resistant to previous treatments. Cancer cells caused by this new mutation may come back and become more aggressive cancers.
- Response to treatment (resistance to treatment)
Some cancer cells can develop mechanisms that make them resistant to the drugs used to treat them, such as increasing the production of proteins that remove drugs from the cell. or molecular changes that prevent drugs from working effectively
- The state of the immune system
A weakened immune system or the inability to find and destroy any remaining cancer cells. Cancer cells can avoid detection by the immune system and grow new ones.
- With risk factors for cancer recurrence
Uncontrollable risk factors such as smoking, alcohol consumption Exposure to toxic chemicals And some viral infections can increase the risk of the cancer returning.
Protection and surveillance
- Follow-up after treatment: Patients should continue to have tests and follow-up with their doctor to watch for the return of the cancer Currently, cancer genetic material in the bloodstream can be determined.
- Changing health behaviors: stop smoking, eat healthy food, exercise and control your weight can reduce your risk of cancer returning.
- Medicines to reduce the risk: In some cases, doctors may recommend medicines to reduce the risk of the cancer coming back, such as tamoxifen, in patients with ER-positive breast cancer.
- Virus testing and vaccination: Testing for cancer-related viruses such as HPV and vaccination against HPV can reduce the risk of cancers associated with these viruses coming back.
The return of cancer is a concern for many people. An important factor that causes cancer to return is the remaining cancer cells. and genetic changes We can prevent cancer from coming back. By seeing the doctor according to their profession Change lifestyle habits and reduce various risk factors
Article by Dr. Asawadet Saenbua, a physician specializing in radiation therapy and oncology. World Medical Hospital (WMC)
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2024-08-26 03:38:00
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