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Fungal meningitis manifesting as hydrocephalus
Abstract:
Four patients with fungal meningitis and hydrocephalus were treated by placement of intraventricular shunts prior to the diagnosis of infection. As a consequence, they were subjected to the risks of surgery as well as to shunt suprainfection. We suggest that chronic meningitis be ruled out in all patients prior to placement of shunts. Preoperative evaluation should include the examination of cisternal or ventricular CSF when a lumbar CSF specimen is nondiagnositc. When fungal meningitis is present, a course of amphotericin B should be initiated and the CSF sterilized prior to the placement of the permanent extracranial shunt. Where acute hydrocephalus supervenes, temporary ventricular drainage may be employed. In some cases of fungal meningitis, the symptoms of hydrocephalus will be resolved with antifungal therapy alone, obviating the need for ventricular decompression.
Insights
Shunts for hydrocephalus risk fungal meningitis suprainfection. Rule out chronic meningitis before shunting; treat fungal meningitis with amphotericin B first to sterilize cerebrospinal fluid (CSF).
Area of Science:
- Infectious Diseases
- Neurosurgery
- Mycology
Background:
- Hydrocephalus management often involves intraventricular shunt placement.
- Fungal meningitis can present with or mimic other neurological conditions.
- Shunt placement in undiagnosed infections carries significant risks.
Observation:
- Four patients with fungal meningitis and hydrocephalus underwent shunt placement before infection diagnosis.
- These patients faced surgical risks and shunt suprainfection (infection of the shunt).
Findings:
- Preoperative diagnosis of chronic meningitis is crucial before shunt placement.
- Cerebrospinal fluid (CSF) analysis, including cisternal or ventricular samples if lumbar is nondiagnostic, is recommended.
- Antifungal therapy (amphotericin B) should precede shunt placement to sterilize CSF.
- Temporary ventricular drainage may be necessary for acute hydrocephalus.
- Antifungal treatment alone may resolve hydrocephalus in some fungal meningitis cases, avoiding surgery.
Implications:
- Implementing a diagnostic protocol for chronic meningitis can prevent shunt-related complications.
- Optimizing the timing of intervention (antifungal therapy vs. shunting) improves patient outcomes.
- This approach reduces iatrogenic risks associated with shunt placement in infected patients.