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.
You can have many symptoms with pleurisy. 1  Chest pain: This is the most common symptom. The pain is generally a sharp, stabbing pain, but may also be a dull ache or a burning sensation. 2  Cough: You may get a cough, depending on the cause of the pleurisy. Your cough may be dry or productive of sputum or blood.