Many patients are asymptomatic

Many patients are asymptomatic. The right lung is affected sixty percent of the time, the left lung thirty five percent, and both lungs are affected in five percent of epithelial malignant mesothelioma cases.

Epithelial malignant mesothelioma is also common in the peritoneum of the abdomen. This is caused by the ingestion of asbestos that enters the air. Patients with this type of mesothelioma may also remain asymptomatic for years and years, though the following symptoms may be present: weight loss, nausea, effusion (fluid build-up) in the stomach, bowel difficulties, foot swelling and anemia. Malignant mesothelioma can also affect the reproductive organs, the heart, and other major organs.