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.
Healthy lifestyle practices can reduce the risk of lung infection for people with pleurisy, including good hand washing, drinking plenty of fluids, eating a well-balanced diet, getting plenty of rest, and refraining from smoking. In some cases, pleurisy can be associated with serious or life-threatening symptoms. Seek immediate medical care (call 911) for serious symptoms, such as severe difficulty breathing, severe sharp chest pain, bluish lips or fingernails, fast heart rate, and anxiety.