Mesothelioma is a type of cancer which is caused by exposure to asbestos.  The symptoms may develop from 15 to even 50 years after exposure to asbestos and typically resemble symptoms of less serious disease.  If you are a senior who has been exposed in the past to asbestos and are experiencing fatigue, a cough, shortness of breath or other pulmonary symptoms you should be checked by your physician.  A surprising statistic is that 75% of Mesothelioma patients are seniors.  There is a great website offering a wealth of information and support on this topic at www.asbestos.com and is sponsored by the Mesothelioma Center.