A Useful Diagnostic Method for Drug-induced Pneumonitis

Abstract

A 51 year-old male was admitted to our hospital with chief complaints of fever, dry cough and dyspnea. Chest X -ray films and his history of taking Chinese medicine for liver dysfunction were suggestive of drug-induced pneumonitis. Lymphocyte stimulation test (LST) to causative Chinese medical drugs of Sho-saiko-to and Dai-saiko-to was negative with peripheral blood lymphocytes (PBL), but was positive with Iymphocytes from bronchoalveolar lavage fluid (BALF). In vivo challenge test for Sho-saiko-to was positive. The LST with BALF-lymphocytes proved to be very useful in making a diagnosis of drug-induced pneumonitis.