A Definite Case of L-carbocisteine-induced Pneumonia with CATCH22 Syndrome

摘要

A 32-year-old male with CATCH22 syndrome presented with a high fever and productive cough after taking drugs for acute bronchitis, including _L-carbocisteine. Chest radiography revealed ground-glass opacities in the bilateral lung fields. He had a history of similar pneumonia. Under the assumption of drug-induced pneumonia, or bacterial or viral pneumonia, all drugs including _L-carbocisteine were discontinued, and antibiotics were started. A drug-induced lymphocyte stimulation test was positive only for _L-carbocisteine. The only drug in common between this and the previous episode of pneumonia was _L-carbocisteine. We thus concluded that this was a definite case of _L-carbocisteine-induced pneumonia in a patient with CATCH22 syndrome.