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.
Signs & Symptoms of Pleurisy. 1  Patient suffering from Pleurisy has chest pain, which worsens upon breathing, coughing or sneezing. 2  Pain from the pleurisy can also radiate towards the shoulder and back. 3  Shortness of breath is one of the symptoms of Pleurisy, as the patient tries to reduce the amount of inhaling and exhaling he/she does. Fever can be present in some cases. Sometimes, the patient suffering from Pleurisy can also have a cough.