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Fungal CNS infections in patients with hematologic malignancy

Livio Pagano1, Morena Caira, Paolo Falcucci

  • 1Istituto di Ematologia, Università Cattolica S. Cuore, Largo Francesco Vito, 1I-00168 Rome, Italy. lpagano@rm.unicatt.it

Expert Review of Anti-Infective Therapy
|October 7, 2005
PubMed

Insights

Central nervous system (CNS) fungal infections, particularly fungal brain abscesses, are serious complications in hematologic patients. Early diagnosis and combined treatment strategies are crucial for managing these challenging infections.

Area of Science:

  • Infectious Diseases
  • Hematology
  • Mycology

Background:

  • Fungal infections can affect the central nervous system (CNS), presenting as brain abscesses (e.g., aspergillosis, zygomycosis) or meningitis (e.g., candidiasis, cryptococcosis).
  • CNS aspergillosis is most common in patients with acute leukemia and allogeneic hematopoietic stem cell transplantation, often originating from pulmonary infection.
  • Fungal brain abscesses, especially those caused by zygomycetes, are associated with high mortality rates and diagnostic challenges due to nonspecific symptoms.

Purpose of the Study:

  • To review the epidemiology, clinical manifestations, diagnostic approaches, and management strategies for CNS fungal infections in hematologic patients.
  • To highlight the difficulties in diagnosing these infections and emphasize the need for aggressive diagnostic procedures.

Main Methods:

  • Review of existing literature on fungal infections of the CNS in the context of hematologic malignancies.
  • Focus on common fungal agents like Aspergillus, Zygomycetes, Candida, and Cryptococcus.
  • Discussion of diagnostic methods, including invasive procedures like stereotactic puncture.

Main Results:

  • Aspergillosis is the most frequent cause of fungal brain abscesses in this patient population.
  • Zygomycosis also frequently causes brain abscesses with high mortality; treatment requires a combination of antifungals (posaconazole, amphotericin B lipid formulations) and surgery.
  • Other agents like Fusarium, Scedosporium, Candida, and Cryptococcus can also cause CNS infections, though less commonly.

Conclusions:

  • CNS fungal infections pose a significant threat to hematologic patients, demanding prompt recognition and intervention.
  • Accurate diagnosis often requires invasive methods due to nonspecific clinical presentations.
  • Effective management necessitates a multidisciplinary approach, integrating antifungal therapy with surgical intervention when appropriate.

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