Fungal Infections of the Central Nervous System

CNS fungal infections comprise a wide spectrum of clinical syndromes, including abscesses, meningitis/meningoencephalitis, focal masses, stroke/vasculitides, immune reconstitution inflammatory syndrome (IRIS), and spinal pathologies such as arachnoiditis. The main etiologies include Aspergillus, Cryptococcus, Candida, Mucorales, dematiaceous molds, and dimorphic endemic fungi, with the route of acquisition being respiratory or traumatic inoculation with subsequent spread hematogenously or contiguously. Proper management focuses on early effective antifungal therapy and surgery for large or compressive mass lesions. While adjunctive recombinant cytokine or growth factor use has been supported in certain hosts with refractory infections, IRIS-like reactions may occur, suggesting alternative approaches such as high-dose pulse corticosteroids followed by taper.