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Updated: Mar 27, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
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.
Background:
Ventriculoperitoneal shunting is an effective treatment for hydrocephalus. Ventriculoperitoneal shunt (VPS) infection is a common complication. Cryptococcus neoformans as an implicated organism is rare. In this report, we describe a patient with cryptococcal VPS infection.
Case Report:
A 52-year-old male with normal pressure hydrocephalus, status post implantation of VPS one year prior to the presentation; who was admitted with a fever, lethargy and confusion for three days. He was treated empirically with intravenous cefepime and vancomycin for VPS infection. The CSF analysis from both the lumbar puncture and the VPS was significant for a low white blood count, low glucose and high protein. Other work-up including India ink and cryptococcal antigen was unrevealing. He remained febrile despite antibiotic treatment for 5 days. The CSF from the shunt was sent for analysis again and it demonstrated similar results from the prior study, but the culture was now positive for Cryptococcus neoformans. The patient was started on oral flucytosine and intravenous liposomal amphotericin B. The VPS was removed and an externalized ventricular catheter was placed. The patient showed rapid resolution of the symptoms.
Conclusions:
To date, there was a total of nine reported cases of cryptococcal VPS infection upon review of the literature. Our presenting case and the literature review highlight the difficulties in making an accurate diagnosis of cryptococcal shunt infection. There were case reports of false negative cryptococcal antigen tests with culture proven cryptococcal meningitis. The CSF culture from the shunt remains a mainstay for identifying cryptococcal shunt infection. Cryptococcal shunt infections are rare and early diagnosis and treatment is essential for patient management which involves shunt replacement with concomitant administration of intravenous antifungal medication. High clinical suspicion is crucial and shunt culture preferably from the valve is recommended.
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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