Topic: Fibrous pleurisy (comparison with serous pleurisy) **Pleurisy (the pleura is a thin film covering the lungs) is an inflammation of the pleura that lines the thoracic region.** Pleural disease can be caused by inflammation of the mediastinal organs, pulmonary or extrapulmonary diseases (tuberculosis , cancer), complications after myocardial infarction or surgical interventions on the heart and blood vessels. At the same time, rarer forms of the disease are possible (metaplastic pleurisy - a special variant of the development of the pleural membrane, cicatricial inflammatory compactions in the pleural layers). The pathogenesis of pleurisy is based on an inflammatory process with melting of the walls of the pleural cavities and filling them with liquid contents in serous and serous-fibrinous pleurisy; with the formation of specific pleural membranes (abscess or pyothorax), with purulent and purulent-desquamative