[Disseminated pulmonary infection due to Cryptococcus neoformans in a non immunocompromised patient]

Véronique Hofman, Nicolas Venissac, Christine Mouroux, Catherine Butori, Jérôme Mouroux, Paul Hofman
Annales de Pathologie 2004, 24 (2): 187-91
We report a case of a primary pulmonary infection due to Cryptococcus neoformans developed in a 40 Year old immunocompetent and HIV negative man. Radiologic findings consisted in diffuse, bilateral reticular and nodular opacities. Bronchoscopy was normal and bronchoalveolar lavage showed numerous macrophages without associated pathogens. A thoracovideoscopy with an open lung biopsy showed numerous cryptococci, free in the alveoli or located within the macrophages. They were associated with an inflammatory infiltrate in the interalveolar spaces, predominantly composed of mononuclear cells. Ultrastructural study showed yeasts with numerous intracytoplasmic organites, a nucleus, a wall and a thick capsule. Pulmonary cryptococcosis is rare in immunocompetent hosts and can be difficult to diagnose since clinicoradiologic features observed in this cryptococcal infection mimic other infectious or neoplastic diseases.

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