Diagnosis of mesothelioma It is important to see a doctor about any symptoms. Only a doctor can make a diagnosis. Diagnosis of mesothelioma may include: medical history, including history of asbestos exposure physical examination blood tests chest x-rays computed tomography (CT) scans drainage and laboratory analysis of the pleural fluid tissue sample (biopsy) to help differentiate mesothelioma from another condition known as benign asbestos-related pleural disease. Test results can take a few days to come back. It is very natural to feel anxious waiting to get your results. It can help to talk to a close friend or relative about how you are feeling. You can also contact the Cancer Council Helpline on 13 11 20 and speak with a cancer nurse.