[Immunoglobulins in clear-fluid pleurisy (preliminary note)]

The study of IgG, IgM and IgA immunoglobulins in the pleural exsudate and in the serum of 34 patients with pleurisy of various etiologies shows an increase in the level of serum immunoglobulins as compared with the level in the exsudate. The only immunoglobulin fraction showing variations in relation with the etiology of the disease in the IgG fraction, which is increased in inflammatory exsudates, in contrast with those found in pulmonary cancers. Recovery without sequellae of pleurisy supposes the presence (in situ) of an increased amount of IgG. These observations are supported by a good statistical-mathematical correlation (p less than 0,01 and 0,001).