Key Takeaways
- Fluid around the lungs is a common complication of pleural mesothelioma. Doctors call this condition a pleural effusion.
- Pleural mesothelioma can cause inflammation that allows additional fluid to enter the space surrounding the lungs.
- Mesothelioma can also interfere with the lymphatic system, reducing the body’s ability to drain excess pleural fluid.
- Fluid buildup can limit lung expansion and cause shortness of breath, chest discomfort, persistent coughing, and difficulty taking deep breaths.
- A pleural effusion does not automatically mean someone has mesothelioma. Other conditions, including heart failure and pneumonia, can also cause fluid around the lungs.
- Doctors may use chest X-rays, CT scans, ultrasound, and thoracentesis to identify fluid buildup and investigate its cause.
- Treatments such as thoracentesis, pleurodesis, and indwelling pleural catheters may help relieve symptoms, although removing fluid does not necessarily treat the underlying cancer.
Fluid buildup around the lungs is a common complication of pleural mesothelioma. It can make breathing difficult, cause chest discomfort, and interfere with everyday activities. But why does mesothelioma cause fluid around the lungs?
The answer involves the thin tissue surrounding the lungs and how cancer interferes with the body’s normal fluid balance.
Doctors call this condition a pleural effusion. Understanding why it happens can help people with mesothelioma recognize symptoms and learn about treatments that may provide relief.
What Is Fluid Around the Lungs?
The lungs are surrounded by a thin layer of tissue called the pleura.
The pleura has two layers: one covering the lungs and another lining the chest wall. Between them is a small space containing fluid that helps the lungs move smoothly during breathing.
When excess fluid collects in this space, it is called a pleural effusion.
The fluid is not inside the lungs. Instead, it builds up around them, potentially placing pressure on the lungs and making breathing more difficult.
Why Does Mesothelioma Cause Fluid Around the Lungs?
Pleural mesothelioma develops in the tissue surrounding the lungs and lining the chest cavity.
As cancer grows, it can interfere with the body’s normal process of producing and removing pleural fluid.
Two important changes can contribute to this buildup.
Cancer-Related Inflammation
Mesothelioma can cause inflammation in the pleura.
Inflammation may cause small blood vessels to become more permeable, allowing additional fluid to enter the space surrounding the lungs.
Reduced Fluid Drainage
The body normally removes excess pleural fluid through the lymphatic system.
Mesothelioma can interfere with this drainage process, allowing fluid to accumulate.
Together, increased fluid production and reduced drainage help explain why mesothelioma causes fluid around the lungs.
How Does Fluid Around the Lungs Affect Breathing?
The lungs need room to expand when a person takes a breath.
When fluid collects in the pleural cavity, it occupies space that the lungs would normally use during breathing. This can limit lung expansion and cause uncomfortable symptoms.
Common symptoms include:
- Shortness of breath
- Chest discomfort or pain
- Persistent coughing
- Difficulty taking deep breaths
- Increased breathlessness during physical activity
Some people may notice that walking, climbing stairs, or completing everyday tasks becomes more difficult.
The severity of symptoms can depend on the amount of fluid and the person’s overall lung function.
Is Fluid Around the Lungs Always Mesothelioma?
No. A pleural effusion does not automatically mean someone has mesothelioma.
Fluid can collect around the lungs for several reasons, including heart failure, pneumonia, blood clots, and other medical conditions.
However, pleural effusion is an important finding in people with pleural mesothelioma.
Doctors must determine what is causing the fluid rather than assuming it is related to cancer.
How Do Doctors Detect Pleural Effusion?
Doctors may suspect fluid buildup when someone reports shortness of breath, coughing, or chest discomfort.
Imaging tests can help identify fluid around the lungs.
These may include:
- Chest X-rays
- CT scans
- Ultrasound
Doctors may also recommend thoracentesis, a procedure that removes fluid from the pleural cavity using a needle.
The collected fluid can be examined to help identify its cause. However, a fluid sample that does not contain detectable cancer cells cannot always rule out mesothelioma. A tissue biopsy may still be necessary.
How Is Fluid Around the Lungs Treated?
Understanding why mesothelioma causes fluid around the lungs also helps explain why doctors may recommend treatments that reduce fluid buildup.
Treatment depends on the amount of fluid, the symptoms it causes, and whether it returns.
Thoracentesis
This procedure removes excess fluid from around the lungs. It may relieve pressure and improve breathing, although the fluid can return.
Pleurodesis
Pleurodesis is designed to reduce repeated fluid buildup by causing the two pleural layers to stick together, reducing the space where fluid can collect.
Indwelling Pleural Catheter
For some people, doctors may place a small tube in the chest that allows fluid to be drained periodically.
These treatments can improve comfort, but removing fluid does not necessarily treat the underlying cancer. Doctors may also recommend cancer-directed treatment when appropriate.
Final Thoughts
Understanding why mesothelioma causes fluid around the lungs can help explain one of the disease’s most common complications.
Pleural mesothelioma affects the tissue surrounding the lungs. As cancer develops, inflammation and changes in normal fluid drainage can cause excess fluid to collect in the pleural cavity.
This buildup can place pressure on the lungs and make breathing more difficult.
Although removing the fluid does not necessarily treat mesothelioma itself, procedures such as thoracentesis, pleurodesis, and pleural catheter placement may help relieve symptoms.
Anyone experiencing new or worsening breathing difficulties should contact their healthcare team promptly. Sudden or severe difficulty breathing requires emergency medical attention.
At Pennsylvania Mesothelioma Information, we understand how overwhelming a mesothelioma diagnosis can feel, and you do not have to face it alone.
If you or a loved one has been diagnosed with mesothelioma, call us today at 800-505-6000 or reach out through our contact form and someone will be with you right away.
Frequently Asked Questions
Why does mesothelioma cause fluid around the lungs?
Pleural mesothelioma can cause inflammation in the tissue surrounding the lungs and interfere with normal fluid drainage. These changes allow excess fluid to collect in the pleural cavity, a condition called pleural effusion.
What is a pleural effusion?
A pleural effusion occurs when excess fluid collects between the two layers of tissue surrounding the lungs. The fluid is not inside the lungs. Instead, it builds up around them and may interfere with normal breathing.
How does fluid around the lungs affect breathing?
Excess fluid occupies space that the lungs normally use to expand during breathing. This can cause shortness of breath, chest discomfort, persistent coughing, difficulty taking deep breaths, and increased breathlessness during physical activity.
Does fluid around the lungs always mean mesothelioma?
No. Pleural effusion can occur for several reasons, including heart failure, pneumonia, blood clots, and other medical conditions. Doctors must investigate the cause rather than assuming that fluid buildup is related to mesothelioma.
How do doctors detect fluid around the lungs?
Doctors may use chest X-rays, CT scans, or ultrasound to identify a pleural effusion. They may also perform thoracentesis to remove and examine a sample of the fluid. A tissue biopsy may still be needed if mesothelioma is suspected.
What is thoracentesis for mesothelioma?
Thoracentesis is a procedure that removes excess fluid from the pleural cavity using a needle. Removing the fluid may relieve pressure on the lungs and improve breathing, although the fluid can return.
Can fluid around the lungs return after treatment?
Yes. Pleural fluid can return after drainage. Doctors may recommend pleurodesis or an indwelling pleural catheter to help manage repeated fluid buildup and improve comfort.
Does removing fluid around the lungs treat mesothelioma?
Removing pleural fluid may relieve symptoms, but it does not necessarily treat the underlying cancer. Doctors may recommend additional cancer-directed treatment depending on the patient’s condition and individual treatment plan.
Sources:
Definition of pleural effusion – NCI Dictionary of Cancer Terms
Early Detection, Diagnosis, and Staging of Mesothelioma | American Cancer Society
