Symptoms of Mesothelioma
Symptoms of mesothelioma are often subtle and non-specific in the early stages, making the disease hard to diagnose. Many early signs resemble common respiratory or digestive problems. As a result, medical attention is often delayed. Most cases are diagnosed at a later stage, when the disease has already advanced.
The type and severity of symptoms vary depending on whether mesothelioma affects the lungs (pleural), abdomen (peritoneal), heart (pericardial), or testes (testicular). Symptoms usually occur because the tumour presses on organs or nerves, causes fluid build-up, or triggers inflammation.
1. General Early-Stage Symptoms
In early mesothelioma, patients may feel very tired, lose weight without trying, experience low-grade fever, night sweats, or lose their appetite. These signs also appear in many other conditions. However, people with a history of asbestos exposure should take them seriously.
2. Symptoms of Pleural Mesothelioma (Lungs)
Pleural mesothelioma affects the membrane around the lungs and accounts for 75% of cases. Patients often have chest pain, a persistent dry cough, shortness of breath due to fluid in the chest (pleural effusion), painful breathing, rib pain, enlarged fingertips, or swelling in the face or arms. Pleural effusion can compress the lung and make breathing difficult.
3. Symptoms of Peritoneal Mesothelioma (Abdomen)
Peritoneal mesothelioma affects the lining of the abdomen and makes up 15–20% of cases. Patients may experience abdominal pain, swelling from fluid build-up, changes in bowel habits, nausea, vomiting, loss of appetite, a feeling of fullness, or unexplained weight loss. These symptoms can also be mistaken for digestive disorders.
4. Symptoms of Pericardial Mesothelioma (Heart)
Pericardial mesothelioma is very rare. It affects the sac around the heart and often causes chest pain, heart palpitations, shortness of breath, fatigue, irregular heartbeat, or fluid around the heart. In some cases, symptoms resemble a heart attack. Because it is rare, doctors may miss it at first.
5. Symptoms of Testicular Mesothelioma (Tunica Vaginalis)
Testicular mesothelioma affects the lining of the testes and is extremely rare. Patients may notice testicular swelling, lumps, pain, fluid build-up, or a feeling of heaviness. These signs can be confused with testicular cancer or hernia.
6. Symptom Progression Over Time
Mesothelioma develops slowly. It often takes 20–50 years after asbestos exposure for symptoms to appear. Once they appear, symptoms usually worsen quickly. Late-stage symptoms include severe weight loss, breathlessness even at rest, bone or nerve pain, neurological issues, and extreme fatigue.
7. Misdiagnosis and Symptom Overlap
Mesothelioma symptoms often look like other conditions. Pleural mesothelioma can resemble pneumonia, COPD, or lung cancer. Peritoneal mesothelioma may be mistaken for IBS, appendicitis, or ovarian cancer. Pericardial mesothelioma may be confused with pericarditis or heart problems. Therefore, misdiagnosis often delays treatment.
8. Importance of Medical Evaluation
Anyone with unusual or persistent symptoms, especially those with past asbestos exposure, should see a doctor. Doctors may use imaging, biopsies, or specialist consultations. Early recognition of mesothelioma symptoms improves the chance of effective treatment and access to therapies or experimental options.
Final Thoughts
Recognising the symptoms of mesothelioma requires both public awareness and careful medical attention. Early signs are often non-specific, which delays diagnosis. Monitoring for even mild symptoms in those exposed to asbestos is crucial. Detecting the disease early allows for better symptom management, possible surgery, or participation in clinical trials.
