[The use of a new marker and test systems for the diagnosis of lung cancer with a study of bronchoalveolar washings]. / Ispol'zovanie novogo markera i test-sistem dlia diagnostiki raka legkogo pri issledovanii bronkhoal'veoliarnykh smyvov.

Diagnostic value of enzyme immunoassays and immunoagglutination kits based on monoclonal antibodies ICO 25 was investigated. Antigen CAg 25 occurred in minimal quantities (5 micrograms/ml maximum) or was absent in the bronchoalveolar lavage of patients with bronchial asthma, chronic bronchitis or free of pulmonary affection. The concentration 9-19 micrograms/ml was registered in epidermoid bronchial cancer and peripheral lung cancer. It is stated that test systems able to detect a new antigen CAg 25 in BAL are diagnostically significant.