Pleuritis - an inflammation of a pleura with formation of fibrinous scurf on its surface or an exudate in its cavity. It is always secondary, is a syndrome or complication of many illnesses, but during the certain period can be pushed in in a clinical picture the foreground, masking a basic disease.

Pathogenesis of the majority of pleurites allergic. In development of a blastomatous pleuritis the great value has blocking by metastasises of a tumour of lymph nodes, lymphatic and venous vessels, at germination of a tumour from organs being by series - the Destruction of serous integuments. Signs, current are defined by localization, prevalence, character of an inflammation of a pleura, change of function of the next organs. The basic forms of pleurites: dry, either fibrinous or exudative. Exudative pleurites, in turn, part on character of an exudate on serous, purulent, hemorrhagic, chyle, admixed. Having defined character of an exudate, it is possible to specify the reason of development of a pleuritis and to choose pathogenetic therapy. So, the reason of occurrence of dry and serous pleurites happen a tuberculosis, pneumonias (metapneumonic pleurites), rheumatic disease and other systemic illnesses of a connecting tissue (rheumatic, lupoid and other pleurites) is more often. Hemorrhagic pleurites develop at neoplasms, thromboembolisms and clottages of pulmonary vessels, hemorrhagic diathesises, a flu, less often at a tuberculosis, rheumatic disease more often. On localization of an exudate distinguish phrenic, interlobar pleurites.