Mesothelioma Guide

Mesothelioma: Symptoms, Causes, Diagnosis and Treatment

Mesothelioma is a rare cancer that develops in the mesothelium, most often in the lining around the lungs. The leading established cause is asbestos exposure, with symptoms sometimes appearing decades later. This hub covers symptoms, diagnosis, treatment, and prognosis in one place.

Evidence-based information Reviewed editorial process Updated regularly
Illustration of the pleura, the thin lining around the lungs affected by pleural mesothelioma

Editorially reviewed, evidence-based content

Rare Cancer of the Mesothelium
Most Commonly Affects the Pleura
Diagnosis Requires Specialist Evaluation
Treatment Depends on Type, Stage, and Health

Start Here: Understanding Mesothelioma

Every patient’s situation is different. These eight starting points cover the core questions most readers have first — from what mesothelioma actually is to what treatment and prognosis may involve.

What Is Mesothelioma? Recommended starting point. A plain-language overview of the disease, where it develops, and why it is often diagnosed late. Read the overview → Symptoms Common early signs, why they are often mistaken for other conditions, and when to seek medical attention. Explore symptoms → Causes and Asbestos Exposure How occupational and secondary asbestos exposure leads to mesothelioma, and who is most at risk. Learn about exposure → Types of Mesothelioma Pleural, peritoneal, pericardial, and testicular mesothelioma differ by location and presentation. Compare types → Mesothelioma Stages How staging describes how far the cancer has spread and why it matters for treatment planning. Understand staging → Diagnosis The imaging, laboratory, and biopsy steps doctors use to confirm a mesothelioma diagnosis. See the diagnosis process → Treatment Options Surgery, chemotherapy, radiation, and emerging approaches used individually or in combination. Review treatment options → Prognosis and Survival The factors that shape individual prognosis, and why general statistics cannot predict one person’s outcome. Understand prognosis →

Types of Mesothelioma

Mesothelioma is classified by the lining in which it develops. Each type can differ in how it presents and how it is managed.

Most common

Pleural Mesothelioma

Affects the pleura — the lining around the lungs

Pleural mesothelioma is the most frequently diagnosed form of the disease. It develops in the thin tissue surrounding the lungs and chest wall, and its early symptoms — breathlessness, chest discomfort, or a persistent cough — can overlap with far more common respiratory conditions.

Read about pleural mesothelioma →

Peritoneal Mesothelioma

Affects the peritoneum — the lining of the abdomen

Develops in the abdominal lining and may cause pain, swelling, or digestive changes.

Read about peritoneal mesothelioma →

Pericardial Mesothelioma

Affects the pericardium — the lining around the heart

A very rare form that develops in the tissue surrounding the heart.

Read about pericardial mesothelioma →

Testicular Mesothelioma

Affects the tunica vaginalis — the membrane surrounding the testis

An extremely rare form, typically identified incidentally during evaluation of other concerns.

Explore all mesothelioma types →

Understand the Differences

Compare Mesothelioma Types

See how the location of mesothelioma can influence symptoms, diagnostic testing, staging and treatment planning.

Explore all mesothelioma types →

From Symptoms to Diagnosis

Reaching a mesothelioma diagnosis usually follows a similar path, though the exact tests and timeline vary by individual.

1

Recognizing symptoms

Noticing breathlessness, chest or abdominal discomfort, fatigue, or unexplained weight loss.

2

Medical consultation

Discussing symptoms and exposure history with a doctor, who may refer you to a specialist.

3

Imaging and tests

X-rays, CT, or PET scans help identify abnormalities and guide next steps.

4

Biopsy and pathology

A tissue sample is examined to confirm whether mesothelioma is present.

5

Type and stage

Results determine the specific type and stage, which shape the treatment plan.

Symptoms associated with mesothelioma can also be caused by many other conditions. Only a qualified healthcare professional can make a diagnosis. Read more in our diagnosis guide.

Mesothelioma Treatment and Care

Treatment is typically guided by a multidisciplinary team — often including oncologists, thoracic or surgical specialists, and palliative care providers — who tailor a plan to the type, stage, and general health of the patient.

Surgery

May be considered in selected cases to remove tumor tissue or relieve symptoms.

Chemotherapy

Medication used to slow cancer growth, often alongside other treatments.

Radiation Therapy

May help reduce tumor size or manage pain and other symptoms.

Emerging and Supportive Treatments

Immunotherapy and clinical trials continue to be studied, alongside supportive and palliative care.

Treatment options depend on mesothelioma type, stage, overall health, specialist assessment, and individual goals.

Prognosis and Practical Support

Prognosis is highly individual. It can vary according to the type of mesothelioma, its stage at diagnosis, general health, tumor characteristics, treatment eligibility, and how well a person responds to treatment. General statistics describe groups of patients and cannot predict any one person’s outcome — a specialist care team is best placed to discuss what to expect in a specific situation.

  • Mesothelioma type
  • Stage at diagnosis
  • Overall health
  • Tumor characteristics
  • Eligibility for treatment
  • Response to treatment

Prognosis & Survival

Factors that shape individual outlook.

Patient Resources

Practical support for patients and families.

Find a Specialist

Locate experienced mesothelioma care.

Financial Assistance

Help with treatment-related costs.

VA Benefits

Support for veterans exposed during service.

Compensation and Legal Information

People affected by occupational or environmental asbestos exposure sometimes have questions about financial support or legal options related to their exposure history. This is a separate topic from medical care, and the information below is intended only as a starting point.

Legal rights, eligibility, filing deadlines, and possible compensation depend on individual circumstances and applicable law. This information is general and is not legal advice.

Types of Mesothelioma
Featured Guide

Types of Mesothelioma

Learn how mesothelioma is classified by location and cell type, including pleural, peritoneal, pericardial, epithelioid, sarcomatoid and biphasic mesothelioma.

Read the Full Guide →

Understanding Mesothelioma Stages

Stages Overview

Mesothelioma Stages: What Stage 1-4 Generally Means

How pleural mesothelioma is staged from 1 to 4, how staging differs from grade and prognosis, and how stage may factor into treatment planning.

Read the Overview →

Featured Mesothelioma Articles

A selection of guides from our Mesothelioma library, covering symptoms, diagnosis, treatment, prognosis, and asbestos exposure.

  • Doctor smiling while consulting with a patient during an appointment

    Stage 4 Mesothelioma: Symptoms and Treatment
    By MesotheliomaFeed Editorial Team • July 20, 2026
    Stage 4 is the most advanced point on the staging scale used for pleural mesothelioma, describing disease that has spread…
    Read More
  • Malignant Mesothelioma

    Malignant Mesothelioma: What You Need to Know 
    By Admin • November 11, 2017
    What is Malignant Mesothelioma?Malignant mesothelioma is a type of cancer that affects the mesothelial cells, which are the cells that…
    Read More
  • A clinical team discusses a scan displayed on a monitor during a care-planning discussion

    What to Expect at Stage 3 Mesothelioma
    By MesotheliomaFeed Editorial Team • September 12, 2017
    Stage 3 describes more advanced local disease in the formal staging system used for pleural mesothelioma, and is itself divided…
    Read More
  • Pericardial Mesothelioma

    Pericardial Mesothelioma & Facts For You to Know
    By Admin • August 25, 2017
    The mesothelium is a membrane that is composed of a single layer of flat cells. This layer of tissue is…
    Read More
  • Peritoneal Mesothelioma

    Peritoneal Mesothelioma – Causes, Symptoms and Treatment
    By Admin • August 19, 2017
    The malignant Mesothelioma which occurs in the lining of the abdomen is called Peritoneal Mesothelioma. This is a very rare…
    Read More
  • Doctor pointing at an x-ray while explaining it to a patient during a consultation

    Stage 2 Mesothelioma: Symptoms and Treatments Options
    By MesotheliomaFeed Editorial Team • August 19, 2017
    Stage 2 sits between the most contained presentation of pleural mesothelioma and more advanced local disease. A Stage 2 diagnosis…
    Read More

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This hub is written and maintained as an independent educational resource. Here is how we approach accuracy and review.

How content is researchedInformation is organized around established medical and legal concepts and cross-checked against the sources referenced throughout this hub.
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What this hub does not replaceNothing on this page replaces personalized advice from a qualified healthcare professional or attorney.

Continue Exploring Mesothelioma Resources

Wherever you are in learning about mesothelioma, these are good next steps.

Understand Symptoms & Diagnosis

Recognizing signs and what the diagnostic process involves.

Explore Treatment & Prognosis

Treatment options and the factors that shape outlook.

Find Patient & Family Support

Practical resources for patients and the people who support them.
This page is for informational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for medical concerns.