If a person is detected with pleural effusion or the building of the fluid, then this fluid is removed from the body of the patient by using a needle that is inserted into the cavity of the chest. A same kind of technique is also used in order to gain the pericardial fluid and the abdominal fluid. Further, the fluid is tested so to have made up of its chemical and it is then viewed through a microscope. 

This is actually done with the help of an expert or a pathologist to determine the presence of the cancer cells. If the cells of the cancer cells are present there, then the special tests are required in order to have mesothelioma diagnosis whether the cancer that is present in the body is mesothelioma or not? 

Then by using thoracoscopy, a new technique to detect the cancer, a sample that has the tissue of pericardial or pleural tumor can easily be obtained. This technique is done or inserted into the chest by small incision. The mesothelioma doctor can be able to see this tumor by the thoracoscope, and can further use the special forceps in order to take tissue biopsy. 

In the similar manner, laparoscopy is used to see and get the biopsy of peritoneal tumor. This procedure has tube that is flexible enough to be attached to the video camera that is then inserted into the cavity of the abdomen by small incisions. This fluid through the process of thoracoscopy and laparoscopy can be collected.