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Updated: Jul 6, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
Abdominal cerebrospinal fluid pseudocyst: a complication of ventriculoperitoneal shunts in adults
F Aparici-Robles1, R Molina-Fabrega
1Servicio de Radiodiagnóstico de Adultos, Hospital Universitario La Fe, Valencia, Spain. feraparici@comv.es
Insights
Abdominal cerebrospinal fluid pseudocysts are rare in adults but can occur after ventriculoperitoneal shunt (VPS) placement. Imaging like CT and ultrasound can diagnose these pseudocysts by showing the shunt
Area of Science:
- Radiology
- Neurosurgery
- Gastroenterology
Background:
- Ventriculoperitoneal shunts (VPS) are used to treat hydrocephalus.
- Abdominal cerebrospinal fluid (CSF) pseudocysts are a rare complication of VPS.
- This complication is even rarer in adult patients.
Observation:
- This study reviewed six adult patients with abdominal CSF pseudocysts secondary to VPS.
- Patients presented with abdominal pain, distension, and a palpable mass.
- Imaging modalities included plain-film radiography, ultrasound, and computed tomography (CT).
Findings:
- All patients exhibited a fluid collection near or involving the VPS catheter.
- Computed tomography (CT) and ultrasound visualized the distal VPS tip within a homogeneous intraperitoneal collection.
- This finding is the primary diagnostic sign for abdominal CSF pseudocysts.
Implications:
- Early diagnosis of abdominal CSF pseudocysts is crucial for effective management.
- Familiarity with imaging findings aids in diagnosing this rare VPS complication.
- Understanding imaging characteristics can guide treatment strategies for affected adult patients.
Abstract:
Abdominal cerebrospinal fluid pseudocyst is an uncommon complication of using ventriculoperitoneal shunt (VPS). Although many cases have been reported in children, abdominal pseudocysts are rare in adult patients. The purpose of this article is to describe and illustrate the findings for this condition on commonly used abdominal diagnostic imaging modalities. This is a retrospective review of the six adult patients diagnosed with abdominal pseudocyst as a consequence of VPS at our centre from 1995 to 2006. We reviewed patients' prior history, cerebral and abdominal clinical manifestations, imaging findings, treatment and evolution. All patients presented with pain and abdominal distension associated with the presence of a palpable mass. Plain-film radiography was carried out in one patient, ultrasound in three and CT in all six. A fluid collection close to or associated to the VPS catheter was observed in all cases. Visualization of the distal tip of the VPS within a homogeneous intraperitoneal collection is the principal diagnostic sign of an abdominal cerebrospinal fluid pseudocyst at ultrasound and CT.
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