Histoplasmosis
In patients with immunosuppression, histoplasmosis can disseminate to the skin, bone marrow, brain, liver, spleen, and lymphatic system. The oral lesion in this image mimics a chancre of primary syphilis, but testing yielded Histoplasma capsulatum.
Image courtesy of Susan Lindsley via the Public Health Image Library of the Centers for Disease Control and Prevention.
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