Cryptococcal Infection of the Ventriculoperitoneal Shunt in an Immunocompetent Patient

Kap Sum Foong1, Ashley Lee2, Gustavo Vasquez3

  • 1Department of Medicine, Crozer Chester Medical Center, Upland, PA, USA.

Abstract

Insights

Cryptococcal ventriculoperitoneal shunt (VPS) infection is rare but challenging to diagnose. Prompt shunt removal, antifungal treatment, and shunt culture are crucial for effective management of this serious complication.

Area of Science:

  • Neuroscience
  • Infectious Diseases
  • Neurosurgery

Background:

  • Ventriculoperitoneal shunting is a standard treatment for hydrocephalus.
  • Infections of ventriculoperitoneal shunts (VPS) are a known complication.
  • Cryptococcal neoformans is an uncommon pathogen causing VPS infections.

Observation:

  • A 52-year-old male with normal pressure hydrocephalus presented with symptoms of VPS infection.
  • Initial empirical antibiotic treatment was ineffective, and diagnostic tests were inconclusive.
  • Subsequent shunt culture revealed Cryptococcus neoformans, despite prior negative cryptococcal antigen tests.

Findings:

  • Accurate diagnosis of cryptococcal shunt infection can be difficult, with potential for false-negative antigen tests.
  • Shunt fluid culture is essential for identifying Cryptococcus neoformans in suspected cases.
  • The patient experienced rapid symptom resolution after VPS removal, externalized catheter placement, and antifungal therapy.

Implications:

  • Early diagnosis and treatment of cryptococcal shunt infections are critical for patient outcomes.
  • Management requires shunt replacement and intravenous antifungal medication.
  • High clinical suspicion and shunt culture, preferably from the valve, are recommended for early detection.

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