The most frequent manifestations of Cryptococcus neoformans (CN) disease are systemic infections in immunocompromised patients and localized pulmonary disease in immunocompetent individuals. Such pulmonary cryptococcosis can range from asymptomatic infection to frank pneumonia that can be severe. Bronchiolitis obliterans organizing pneumonia (BOOP) is a rare severe form of pneumonitis caused by a variety of infectious and toxic agents or connective tissue diseases. BOOP due to Cryptococcus neoformans has very rarely been reported; there have been only five such case reports, mostly in immunocompromised patients. We report herein on a case of CN-associated BOOP in an immunocompetent individual and discuss the diagnosis and treatment of this entity.
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