Mesothelioma

What is mesothelioma?

Mesothelioma starts in cells in the membrane that lines body cavities and surrounds most of your internal organs (called the mesothelium). The most common type is pleural mesothelioma.

Risks for mesothelioma

Risks for mesothelioma include asbestos and ionizing radiation.

Signs and symptoms of mesothelioma

Signs and symptoms of mesothelioma vary depending on if cancer starts in the pleura or peritoneum. Common symptoms include weight loss and fatigue.

Diagnosis of mesothelioma

Mesothelioma can be diagnosed or ruled out by tests such as an x-ray, CT scan or MRI.

Stages of pleural mesothelioma

The stage of pleural mesothelioma describes the size of the tumour (T), if cancer is in the lymph nodes (N) and if it has spread, or metastasized (M). The other types of mesothelioma are not given a stage.

If mesothelioma spreads

Pleural mesothelioma can spread (metastasize) to the space between the lungs (mediastinum) or to organs in the chest. Peritoneal mesothelioma can spread to organs in the abdomen.

Prognosis and survival for mesothelioma

Prognosis estimates the outcome for mesothelioma. It depends on many factors, including the subtype of mesothelioma, stage and if the cancer can be removed with surgery.

Treatments for mesothelioma

Treatment for mesothelioma depends on if doctors think most or all of the cancer that they can see can be removed with surgery. It may also be treated with chemotherapy, radiation therapy and immunotherapy.

Supportive care for mesothelioma

Supportive care helps people meet the physical, practical, emotional and spiritual challenges of mesothelioma.

Mesothelioma statistics

Cancer statistics tell us how many people in Canada are diagnosed with and die from mesothelioma in a certain time frame.

Your trusted source for accurate cancer information

With just $5 from readers like you, we can continue to provide the highest quality cancer information for over 100 types of cancer.

We’re here to ensure easy access to accurate cancer information for you and the millions of people who visit this website every year. But we can’t do it alone.

If everyone reading this gave just $5, we could achieve our goal this month to fund reliable cancer information, compassionate support services and the most promising research. Please give today because every contribution counts. Thank you.

Medical disclaimer

The information that the Canadian Cancer Society provides does not replace your relationship with your doctor. The information is for your general use, so be sure to talk to a qualified healthcare professional before making medical decisions or if you have questions about your health.

We do our best to make sure that the information we provide is accurate and reliable but cannot guarantee that it is error-free or complete.

The Canadian Cancer Society is not responsible for the quality of the information or services provided by other organizations and mentioned on cancer.ca, nor do we endorse any service, product, treatment or therapy.


1-888-939-3333 | cancer.ca | © 2025 Canadian Cancer Society