Mesothelioma diagnosis is a very difficult task for a physician, for many of the symptoms which mesothelioma patients suffer from, are also common symptoms to other diseases. A good, sufficient diagnosis would begin with a review of the patient’s medical history, as well as what he or she has been exposed to in their working environment, or living environment. Some patients may not display any symptoms of mesothelioma, but if the physician looks at their history and sees that he/she has been exposed to excessive amounts of asbestos particles, then he/she may have a high chance of having mesothelioma, regardless of whether symptoms appear or not. A physican examination is followed, including such tests as x-rays of the chest and testing on the functioning of the lungs. CAT scans or MRI’s will probably be needed as well, as well as cytology if excessive amounts of fluid are present. If cytology is performed, and the test comes out to be positive, then a biopsy is necessary to fully and officially diagnose the patient with mesothelioma. The procedure entails removing a tissue sample from the body through biopsy, and the tissue is later scrutinized and examined by a histopathologist. There are many ways for the biopsy to be performed. A thoracoscopy may be performed if the area affected is in the chest, and a laporoscopy may be performed for areas affected in the abdominal region. After the diagnosis is complete and the patient is diagnosed with a specific form of mesothelioma, the doctor or physician continues to suggest treatment options and methods.