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Pulmonary pseudallescherioma associated with systemic lupus erythematosus.

We report a case of fungus ball due to Pseudallescheria boydii (pseudallescherioma) associated with systemic lupus erythematosus. Direct microscopical examination revealed a fungus with broad septate hyphae resembling Aspergillus and the fungus was identified as P. boydii on culture. Surgical resection was required to control episodes of hemoptysis. Cases of pulmonary pseudallescheriasis are rare, especially in Japan. However, some cases previously diagnosed as pulmonary aspergillosis may have been found to be caused by P. boydii, if adequate culture studies had been conducted. Unlike Aspergillus, P. boydii is resistant to amphotericin B. Therefore, we emphasize the importance of a correct diagnosis based on culture examination.