According to Dameshek, true polycythemia (polycythemia vera: PV) is a chronic myeloproliferative disorder of the total bone marrow without any evidence of invasiveness, in which erythrocytosis, leukocytosis, and thrombocytosis are all simultaneously present.
However, in patients suffering from connective tissue disease or lung cancer, chest pain may persist for long periods. What Causes Pleurisy? Pleurisy may occur inhealthy, young people who have an infection in the lungs caused by bacteria or virus. Pleurisy may last a few days or up to two weeks. In rare cases, the infection may spread, causing pleurisy in other people. Pleurisy may also be associated with air leaking in the pleural cavity from a punctured lung, a condition called pneumothorax.
A needle is placed through the skin and muscles of the chest wall into the space around the lungs, called the pleural space. Pleural fluid is then collected and sent to the laboratory for testing. Thoracentesis usually takes 10â15 minutes, but it may take longer if there is a large quantity of fluid to be drained. Following the procedure, the results of the fluid lab tests will be sent to your doctor.