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Updated: May 9, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
Abdominal cerebrospinal fluid pseudocyst occurring 21 years after ventriculoperitoneal shunt placement: a case report
Atsumi Tamura1, Dai Shida, Kyosuke Tsutsumi
1Department of Surgery, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Koto-bashi, Sumida-ku, Tokyo 1308575, Japan.
Insights
Adults can develop abdominal cerebrospinal fluid pseudocysts, a rare complication of ventriculoperitoneal shunts (VPS). This case highlights the importance of considering VPS complications in acute abdominal presentations.
Area of Science:
- Neurosurgery
- Gastroenterology
- Pediatric Surgery
Background:
- Ventriculoperitoneal shunts (VPS) treat hydrocephalus but can have rare complications.
- Abdominal cerebrospinal fluid pseudocysts are a known, though infrequent, complication of VPS.
- While typically seen in childhood, pseudocysts can occur in adults with long-term shunt survival.
Observation:
- A 22-year-old male presented with abdominal distention 21 years after VPS placement for spina bifida.
- CT imaging revealed a fluid collection near the VPS catheter tip causing gastric obstruction.
- Emergency laparotomy identified a large pseudocyst in the omental bursa.
Findings:
- Surgical drainage of 1500 ml clear fluid from the pseudocyst.
- Repositioning of the distal VPS catheter outside the cystic mass.
- Diagnosis of an abdominal cerebrospinal fluid pseudocyst secondary to VPS.
Implications:
- Gastroenterological surgeons must recognize this potential VPS complication.
- Cerebrospinal fluid pseudocysts should be included in the differential diagnosis for acute abdomen in patients with VPS.
- Awareness can lead to timely diagnosis and management, preventing life-threatening outcomes.
Background:
Ventriculoperitoneal shunt (VPS) placement is an established procedure for the treatment of hydrocephalus of diverse etiologies in children and adults. Abdominal cerebrospinal fluid pseudocyst, which is potentially life threatening, is a rare complication and usually occurs during childhood. However, with increasing longevity following successful treatment, it can also occur in adults.
Case Presentation:
Here we describe a 22-year-old man who was admitted to our hospital because of diffuse abdominal distention. A VPS was placed 21 years earlier to treat hydrocephalus secondary to spina bifida. Abdominal computed tomography (CT) revealed a homogeneous low-density fluid collection adjacent to the VPS catheter tip, causing stomach obstruction. Thus a peritoneal pseudocyst around VPS was suspected and emergency laparotomy was performed. The large mass was localized in the left upper abdomen between the stomach and mesentery of the transverse colon, exactly at the omental bursa. The cystic mass was opened and 1500 ml of clear fluid was drained; the distal end of the VPS was repositioned outside the mass. Thus, an abdominal cerebrospinal fluid pseudocyst as a complication of VPS was diagnosed.
Conclusion:
Gastroenterological surgeons should be aware of this possible complication, and this complication should be considered during differential diagnosis of an acute abdomen complaint.
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Increased Intracranial Pressure ll: Pathophysiology
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CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain.
Cerebral Edema l: Introduction
