What are the signs of mesothelioma?

The symptoms of mesothelioma are caused by a build-up of tumor tissue surrounding the lung and fluid in the pleural space that prevents the lung from expanding fully. This causes pressure on the lung, leading to pain and shortness of breath. As the disease progresses, patients may lose weight and have a dry, hacking cough. In the abdomen, this fluid and tumor tissue causes abdominal swelling, pain and weight loss.