[Clinico-immunologic aspects of the differential diagnosis of disseminated processes in the lungs].

The results of examination of 224 patients with newly detected disseminated processes in the lungs who were admitted for differential diagnosis are presented. Immunologic studies which include determination of the natural killer activity, neutrophil phagocytosis, a total number of T- and B-lymphocytes and synthesis of antituberculosis antibodies in the indirect hemagglutination reaction with three basic M. tuberculosis antigens (phosphatide, polysaccharide and tuberculin) proved to be of high diagnostic value. Immunologic tests used along with clinical studies allowed timely diagnosis of disseminated pulmonary tuberculosis in 62 patients, the disseminated forms of lung sarcoidosis in 115 and nonspecific diseases (microfocal pneumonias of a protracted character, pneumoconioses carcinomatoses, etc.) in 57 patients.