Primary pulmonary Cryptococcosis presenting as a mass and organizing pneumonia

抄録

Cryptococcus neoformans is a species of yeast that is sometimes transmitted via the inhalation of infected, dried pigeon droppings. Both immunocompromised and immunocompetent individuals can be affected; the infection is primary in the latter while in the former it is called opportunistic or secondary. However, immunocompetent individuals rarely report any symptoms, and in most cases, computed tomography (CT) demonstrates solitary or multifocal nodules of primary pulmonary cryp- tococcosis (PPC). In secondary infections, various patterns, such as a mass, consolidation or cavitation, may be observed depending on the patient’s medical background and immune reaction. Pathological findings also differ among patients for these reasons. We herein describe a case of PPC with atypical radiological and pathological findings.