"Pulmonary blastomycosis refers to respiratory infection with the organism Blastomyces dermatitidis. It is a pyogranulomatous fungal infection and the respiratory system is the commonest site of infection with this organism. The disease is endemic to North America."
"There can be marked variation in presentation ranging from from asymptomatic infection to rapidly severe and fatal disease. Most will present as an acute to chronic pneumonia or may be discovered as a mass-like lung opacity on a radiograph 1. Immunosuppressed individuals may develop haematogenous seeding of distant sites (see case 2) 10."
"While individual features are non-specific, several radiographic patterns have been described which include air-space disease, nodular opacities, mass-like lesions, interstitial disease, cavitation (37% 8) and miliary disease 6,7. The air space consolidation and mass-like opacities may have an upper lobe predilection 9."