Mesothelioma is an aggressive cancer that develops in the thin lining of the lungs, abdomen, or heart, most often after exposure to asbestos. Treatment typically combines surgery, chemotherapy, and radiation therapy. Radiation therapy uses high-energy beams or radioactive materials to destroy cancer cells and shrink tumors. Among the radiation approaches used for mesothelioma is a technique called brachytherapy, which delivers radiation from inside the body rather than from an external machine.
How Brachytherapy Works
Brachytherapy involves placing small radioactive seeds, wires, or catheters directly into or near the tumor site. Because the radiation source sits close to the cancer, doctors can deliver a high dose to the tumor while limiting exposure to surrounding healthy tissue. This is different from external beam radiation therapy (EBRT), which directs radiation at the tumor from outside the body.
For mesothelioma, brachytherapy is most commonly used in one of two ways:
- Interstitial brachytherapy: Radioactive seeds or catheters are implanted directly into the tumor tissue during surgery. This is often used for pleural mesothelioma, which affects the lining of the lungs.
- Intracavitary brachytherapy: Radioactive material is placed into a body cavity, such as the chest or abdominal space, to treat the lining surfaces where mesothelioma tends to spread. This approach may be used for peritoneal mesothelioma, which affects the abdominal lining.
In some cases, the implants are temporary and removed after a set period. In others, they remain in place permanently but lose their radioactivity over time. The choice depends on the tumor location, size, and the patient's overall treatment plan.
Why Brachytherapy Is Used for Mesothelioma
Mesothelioma tumors often grow along the thin linings of the chest or abdomen, making them difficult to treat with surgery alone. Even after a surgeon removes visible tumors, microscopic cancer cells may remain. Brachytherapy can target these residual cells directly at the source. It is frequently used as an adjuvant therapy, meaning it is given alongside surgery or chemotherapy to improve the chances of controlling the disease.
Brachytherapy may also be considered when a tumor recurs in a specific area after other treatments have been tried. Because it delivers a concentrated dose, it can sometimes treat spots that are hard to reach with external radiation.
Potential Benefits and Limitations
The main advantage of brachytherapy is precision. By placing radiation close to the tumor, doctors can spare nearby organs such as the heart, lungs, and esophagus from unnecessary exposure. This may reduce some side effects commonly seen with external radiation, such as fatigue, skin irritation, and inflammation of healthy tissue.
However, brachytherapy is not appropriate for every patient. It requires a surgical procedure to place the implants, which carries its own risks. It is also most effective when the tumor is localized and well-defined. For mesothelioma that has spread widely across the lining, external beam radiation or systemic chemotherapy may be more suitable. As with any cancer treatment, the decision depends on the stage of the disease, the patient's overall health, and the recommendations of the care team.
Brachytherapy in Missouri
Missouri has a long industrial history that includes shipbuilding, manufacturing, construction, and mining, all of which exposed workers to asbestos. Cities such as St. Louis, Kansas City, and Joplin have seen asbestos-related illnesses among former workers and their families. For Missouri residents diagnosed with mesothelioma, treatment is available at major cancer centers across the state, including facilities in St. Louis and Kansas City that offer advanced radiation oncology services.
Patients considering brachytherapy should discuss it with a radiation oncologist who has experience treating mesothelioma. A multidisciplinary team, including surgeons, medical oncologists, and radiation specialists, can help determine whether brachytherapy fits into an overall treatment strategy.
Looking Ahead
Brachytherapy is one of several radiation techniques used in the fight against mesothelioma. Researchers continue to study how to combine it with newer therapies to improve outcomes. For patients and families affected by asbestos exposure in Missouri, understanding the range of treatment options, including brachytherapy, is an important step in making informed decisions with their medical team.
