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Published on: February 15, 2011
A case of HIV-associated cerebral histoplasmosis successfully treated with fluconazole
1Department of Internal Medicine I, University of Vienna Medical School, Austria.
Abstract:
Clinically apparent involvement of the central nervous system is a rare event in cases of disseminated histoplasmosis, even in HIV-infected persons. Despite therapy with amphotericin B, mortality remains very high. Reported here is the case of an HIV-infected patient with a 3-month history of fever, cough, weight loss and miliary lung infiltrates. Four weeks after initiation of tuberculostatic therapy, high-grade fever, neurological symptoms, personality changes and respiratory deterioration occurred. Magnetic resonance imaging of the brain showed multiple mass lesions, and a chest radiograph revealed worsening of pulmonary infiltrates. Methenamine silver staining of a lung biopsy specimen demonstrated Histoplasma capsulatum. Subsequently, this pathogen was cultured from lavage fluid. Following high-dose intravenous fluconazole therapy (800 mg once daily), the patient's condition improved markedly within 10 days, followed by an almost complete resolution of pulmonary and cerebral mass lesions. This is believed to be the first documented case of rapid improvement of disseminated histoplasmosis with central nervous system involvement in an HIV-infected patient upon induction of therapy with fluconazole.
Insights
Disseminated histoplasmosis with central nervous system involvement in HIV patients is rare and often fatal. High-dose fluconazole therapy led to rapid improvement and resolution of lesions in a documented case.
Area of Science:
- Infectious Diseases
- Neurology
- HIV/AIDS Research
Background:
- Disseminated histoplasmosis is a severe fungal infection, particularly concerning in immunocompromised individuals like those with HIV.
- Central nervous system (CNS) involvement in disseminated histoplasmosis is uncommon but associated with high mortality, even with amphotericin B treatment.
Observation:
- An HIV-infected patient presented with disseminated histoplasmosis, including miliary lung infiltrates and subsequent neurological deterioration with brain lesions.
- Initial treatment with tuberculostatic agents was ineffective, highlighting the need for specific antifungal therapy.
Findings:
- Histoplasma capsulatum was identified in lung biopsy and lavage fluid.
- High-dose intravenous fluconazole (800 mg daily) resulted in rapid clinical improvement within 10 days.
- Significant resolution of both pulmonary and cerebral mass lesions was observed following fluconazole therapy.
Implications:
- This case suggests that high-dose fluconazole can be an effective treatment for disseminated histoplasmosis with CNS involvement in HIV-infected patients.
- The findings challenge the traditional treatment paradigms and offer a potential alternative for this severe opportunistic infection.
- Further research into fluconazole's efficacy and optimal dosing for CNS histoplasmosis in HIV is warranted.
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