Written By: David Statman
Stage 4 mesothelioma is the most advanced and final stage of mesothelioma. While treatment options are available, the prognosis is generally poor. Patients often receive treatment aimed at managing symptoms and improving quality of life. A second opinion from a specialist may reveal a lower stage and more promising prognosis.
Medically reviewed for accuracy by
Dr. Stephen Williams
Precision Oncology Scientist
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Stage 4 mesothelioma is the most advanced and final stage of the rare and aggressive cancer known as mesothelioma. This cancer forms in the lining of the lungs or abdominal cavity, and by stage 4 has spread significantly through the body.
Pleura (the lining of the chest cavity) for pleural mesothelioma
Peritoneum (the membrane covering the abdominal cavity) for peritoneal mesothelioma
Some characteristics of stage 4 mesothelioma are:
In stage 4, surgery is generally not an option. However, treatment is available to manage symptoms, improve comfort, and potentially extend survival.
Diagnosing stage 4 mesothelioma is common as most people do not realize they have the cancer until it has spread significantly. Research in the Journal of Thoracic Oncology found that approximately 20% of mesothelioma patients are diagnosed in stage 4.
Mesothelioma imaging tests show the location and size of tumors in the patient’s body. This is crucial to diagnosing the stage.
Imaging tests for mesothelioma include:
X-rays
Chest X-rays are often the first imaging tool used to detect abnormalities, such as fluid buildup in the pleural space (pleural effusion), which may indicate mesothelioma.
CT scans
Computed Tomography (CT) scans provide more detailed images and can help identify the size, location, and extent of the tumor within the pleura or peritoneum. CT scans are instrumental in detecting early-stage tumors that might not be visible on routine X-rays.
MRI scans
Magnetic Resonance Imaging (MRI) scans may be employed for more detailed soft tissue evaluation, helping to assess the invasion of tumors.
A biopsy is the definitive method for diagnosing mesothelioma. Doctors collect a sample of tissue and send it to a lab to be examined under a microscope.
The biopsy types for mesothelioma are:
Intense abdominal or chest pain
Consistent fluid buildup in the chest or abdomen
Chronic fatigue, night sweats and fever
Coughing up blood (hemoptysis)
Difficulty swallowing (dysphagia)
Persistent cough
Hoarseness
Face or arm swelling
Loss of appetite
Shortness of breath (dyspnea)
If you are experiencing these symptoms, see your doctor right away. You should be evaluated for the cause of your symptoms. This is how to receive a mesothelioma diagnosis.
Stage 4 mesothelioma treatment options include chemotherapy, immunotherapy, radiation therapy and palliative therapy. These treatment options are primarily used to manage symptoms, alleviate pain, and improve the patient’s quality of life.
In stage 4, tumors have possibly reached the liver, heart or kidneys. The spread of tumors to these vital organs – and the overall mass of the cancer in the body – makes mesothelioma surgery unlikely.
There is still long-term survival hope for patients. Chemotherapy, radiation and some emerging therapies could shrink the disease enough to “downstage” the patient to stage 3 or stage 2. Immunotherapy, for instance, can slow or even stop tumor growth and extend life.
Chemotherapy for mesothelioma uses cancer-fighting drugs to target mesothelioma cells, shrink tumors, and slow cancer progression. The U.S. Food and Drug Administration (FDA) has approved pemetrexed and cisplatin as chemotherapy for mesothelioma. Doctors typically use these drugs together to maximize their effectiveness in controlling the disease.
Immunotherapy for mesothelioma enhances the immune system’s ability to recognize and attack cancer cells. The FDA has approved three immunotherapy drugs to treat mesothelioma.
These treatments help slow disease progression and may improve survival outcomes in some patients. Since they are approved for people who cannot have surgery, they are top options to consider for patients with stage 4 mesothelioma.
Radiation for mesothelioma uses high-energy beams to target and destroy cancer cells while minimizing damage to healthy tissue. It can shrink tumors, slow disease progression, and alleviate symptoms.
Palliative mesothelioma surgery aims to relieve symptoms and improve quality of life. While not curative, these procedures can extend survival by a few months and help manage complications.
These procedures help reduce discomfort and improve lung or organ function, enhancing the patient’s overall well-being.
Clinical trials offer access to experimental treatments that may be more effective than standard therapies. Immunotherapy, for example, has shown promise in enhancing the immune system’s ability to combat mesothelioma.
Some clinical trials target late-stage cancer, including stage 4 mesothelioma. Patients often enroll in clinical trials to access emerging treatments that could improve their life expectancy.
The prognosis for mesothelioma for stage 4 is typically less than one year. A study published in UpToDate reported a median life expectancy of 11 months following diagnosis.
Several factors influence an individual’s prognosis, including cell type, overall health, age, and gender. While stage 4 mesothelioma has a poor prognosis, some patients respond well to treatment and may live longer than expected.
Receiving a second opinion is critical for patients diagnosed with stage 4 mesothelioma. A second opinion from a mesothelioma specialist could reveal a different stage, more treatment options, and a better prognosis.
According to a study published in the Journal of Thoracic Oncology, around 13.5% of patients who initially receive a stage 4 diagnosis were reclassified to a lower stage. People in lower stages are more likely to be considered for surgery and clinical trials. This reassessment can positively impact treatment decisions and potential outcomes.
There have been a few mesothelioma survivors who were diagnosed with stage 4 cancer. One mesothelioma survivor, Alexis Kidd, is an example of why you should get a second opinion.
Alexis Kidd
Peritoneal Mesothelioma Survivor
Her story underscores the potential benefits of getting a second opinion from a specialist and receiving treatment from experienced mesothelioma doctors.
The TNM system (Tumor, Node, Metastasis) is the most widely used staging system for pleural mesothelioma. It evaluates three key factors:
In stage 4 mesothelioma, the TNM system defines the disease as having large tumors, extensive lymph node involvement and widespread metastasis. Lymph nodes are often significantly swollen and cancer has likely spread to distant organs such as the liver, brain or other areas of the body.
The Butchart System is the oldest staging system for pleural mesothelioma. It focuses on the size of tumors and where they’ve spread. In stage 4, the mesothelioma cells have spread through the bloodstream to distant organs, such as the liver or brain.
The Brigham System focuses on whether surgery is an option. It was designed by esteemed mesothelioma specialist Dr. David Sugarbaker when he worked at Brigham and Women’s Hospital in Boston. Since stage 4 mesothelioma has spread to distant organs and lymph nodes, this system does not consider stage 4 mesothelioma to be operable.
The peritoneal cancer index (PCI) is a staging system for peritoneal mesothelioma. It classifies how much tumors have spread within the abdominal cavity.
The abdomen is split into 13 regions, and each region receives a score between 0 and 3. The score is based on the extent of tumors in the region, with 3 signaling that tumors cover the majority of the region and 0 meaning that tumors aren’t present.
PCI scores between 31 and 39 correlate to stage 4 mesothelioma.
Example of the PCI System
PCI Score: 8 - Stage 1
Stage 4 mesothelioma is the most advanced of the four mesothelioma stages and usually means tumors have spread to distant lymph nodes, the neck, the spine or other areas. The prognosis for stage 4 mesothelioma is poor and treatment is limited.
The symptoms of stage 4 mesothelioma include high-grade fever, night sweats, difficulty swallowing, anemia, coughing up blood, and face or arm swelling.
People with stage 4 mesothelioma can live many years depending on factors such as their overall health, treatment, and their cell type. Typically, stage 4 mesothelioma has an average life expectancy of 8-11 months. Each case is different and may present a better prognosis than the average.
People are diagnosed with stage 4 mesothelioma less than 15% of the time. In one study, around 13% of mesothelioma cases were diagnosed in stage 4. Fortunately, around 12% of the stage 4 cases were misdiagnosed by stage, later changing to a lower stage with a better prognosis.
The treatment options for stage 4 mesothelioma include chemotherapy, immunotherapy and radiation therapy. Most curative surgeries are not options for stage 4 mesothelioma. Other options for mesothelioma treatment are available in clinical trials.
Sources & Author
Stage 4 mesothelioma represents the most advanced stage of this aggressive cancer, which primarily develops in the lining of the lungs or the abdominal cavity. At this stage, the cancer has typically spread extensively to distant organs such as the liver, brain, or other parts of the body. The tumors are often widespread, affecting multiple organs and lymph nodes, and the cancer has usually metastasized, or spread, beyond the initial site. Because of this extensive progression, surgical options are generally limited or not feasible, and the focus shifts toward managing symptoms and improving the patient's quality of life.
Diagnosing stage 4 mesothelioma usually occurs when symptoms become severe or noticeable, which often happens after the cancer has spread significantly. Healthcare providers rely on a combination of imaging tests, such as X-rays, CT scans, and MRIs, to visualize the location and extent of the tumors. A definitive diagnosis is made through a biopsy, where a small tissue sample is examined under a microscope. Common symptoms at this stage include intense chest or abdominal pain, persistent cough, fluid buildup in the lungs or abdomen, difficulty swallowing, fatigue, and swelling of the face or arms. Recognizing these symptoms promptly and seeking medical evaluation is essential for proper diagnosis and management.
While stage 4 mesothelioma has a poor prognosis, with an average survival time of around one year, there are treatment options available that can help manage symptoms and potentially extend life. These include chemotherapy, immunotherapy, and radiation therapy, which aim to slow tumor growth and alleviate pain or discomfort. Palliative surgeries might be performed to reduce fluid buildup and improve breathing or organ function. Clinical trials also offer access to emerging treatments that could be more effective for some patients. It is important to note that individual factors such as overall health, cell type, and response to therapy influence outcomes. Patients are encouraged to seek second opinions from specialists, as this can sometimes reveal an earlier stage or more treatment options, offering hope for a better quality of life and extended survival.
