Abstract
In many patients with pulmonary cryptococcosis, chest radiographs show solitary or multiple nodular shadows, but pulmonary cryptococcosis with a large mass is rare. A previously healthy 45-year-old man presented to the hospital complaining of fever and cough. Contrast-enhanced computed tomography showed a tumor shadow with a long diameter of 64 mm in the lower lobe of the right lung. We considered the possibility of a lung abscess, but because it was refractory to antibiotics, we suspected the possibility of a malignant tumor. Transbronchial biopsy was performed, and Cryptococcus neoformans was detected. There were no complications of meningitis or immune deficiency, including acquired immune deficiency syndrome. He was administered antifungal drugs, and shrinkage of the shadow was achieved. Pulmonary cryptococcosis should also be considered when a large lung mass is observed.
