A Case of Histoplasma duboisii Brain Abscess and Review of the Literature.

Histoplasmosis is a fungal disease caused by Histoplasma capsulatum var. capsulatum (Hcc) and H. capsulatum var. duboisii (Hcd). Central nervous system (CNS) involvement is rare. So far, the few cases reported having Histoplasmosis associated brain abscesses were caused by H. capsulatum var. capsulatum. Herein, we report a unique case of brain abscess caused by H. capsulatum var. duboisii occurring in a 42-year-old immunocompromised woman with HIV. Initially, she presented with hypothermia, vomiting, frontal headache, evolving over one month. She then progressed to have a generalized seizure. Brain MRI showed multifocal brain abscesses and a frontal osteitis. The frontal osteitis was biopsied and confirmed the diagnosis of H. capsulatum var. duboisii. She was successfully treated with liposomal amphotericin B (150 mg daily) for the first four weeks and itraconazole (200mg twice daily) for six months.