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.
Pleurisy (pleuritis) is a type of lung inflammation that causes sharp chest pains when breathing. Here are the causes, symptoms and treatment for pleurisy. Pleurisy (pleuritis) is a type of lung inflammation that causes sharp chest pains when breathing. The pleura is a membrane made up of layers of tissues that line the inner chest cavity and a layer of tissues around the lungs.