Mesothelioma begins as tiny nodules on the lining of the lungs or abdomen. The cancer doesn’t usually cause symptoms until 20 to 50 years after exposure to asbestos and when the disease has grown or spread.
Symptoms of chest pain, weight loss and fatigue commonly do not appear until the tumors start to press against nerves, organs, bones and other parts of the body, which happens during stage 3 or stage 4 mesothelioma.
Because it does not usually produce such signs until much later in the disease process, it is difficult to diagnose mesothelioma in stage 1 or 2 based on symptoms alone. However, in some instances, early-stage mesothelioma can produce enough pleural fluid around the lung to cause shortness of breath or cough without having spread.
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