Blastomycosis
Last Updated: October 1, 2018
Figure 1: These images demonstrate a fairly classic appearance of parenchymal blastomycosis. There is a large, cystic lesion with smooth rim enhancement demonstrated before and after contrast (top row), normal diffusivity in the cavity on DWI/ADC (middle row) and a mild amount of surrounding vasogenic edema on T2/FLAIR (bottom row). More commonly, these patients will present with meningitis (not presented here).
Description
- Caused by the dimorphic fungus Blastomyces dermatitidis
- Endemic to Ohio and the Mississippi river valley
- Lung infection with hematogenous spread to the CNS in 5-10% of cases of disseminated infections
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