Successful treatment of non-tuberculous mycobacterial pleurisy with acute fever by antimycobacterial therapy.

We report two cases of pleurisy caused by non-tuberculous mycobacteria followed by pneumothorax. The onset of pleurisy was accompanied by acute fever. Cultured samples of the pleural effusions from the two patients, an 80-year-old man and an 87-year-old woman, were ultimately found to contain Mycobacterium intracellulare and Mycobacterium kansasii, respectively. Both patients were initially administered antibiotics, but their fevers persisted. Therefore, different combinations of antimycobacterial drugs were used, which reduced the fever in a few days. In these patients, pleurisy caused by non-tuberculous mycobacteria followed by pneumothorax was characterised by acute fever and improvement in the fever after administration of antimycobacterial drugs; however, the aetiology remains to be clarified.