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Child's Nervous System

, Volume 35, Issue 12, pp 2313–2318 | Cite as

Volume change of cranial arachnoid cysts after successful endoscopic fenestration in symptomatic children

  • M. Pitsika
  • S. SgourosEmail author
Original Article
First Online:
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Abstract

Introduction

Endoscopic fenestration remains a first-line treatment option for symptomatic arachnoid cysts. After fenestration, the cyst does not collapse but reaches an equilibrium state. The aim of this study was to evaluate the change in cyst volume following successful fenestration and symptomatic improvement.

Methods

Cyst volume was measured on serial MR scans of 4 children (1 female, 3 males) with symptomatic arachnoid cysts (middle fossa n = 2, choroidal fissure n = 1 and posterior fossa n = 1), who experienced symptom resolution after endoscopic fenestration. Average follow-up was 20.5 months (range 3–48).

Results

Significant cyst volume reduction was seen in all four patients. In patient 1, preoperative cyst volume was 336 cm3 and decreased to 194 cm3 at 7 months (42% reduction). In patient 2, preoperative volume was 12.64 cm3 and reduced to 1.51 cm3 at 3 months (88% reduction). In patient 3, preoperative volume was 105 cm3 and reduced to 72 cm3 in 2 months (30% reduction). In patient 4, preoperative volume was 125 cm3 and reduced to 54 cm3 at 7 months (56% reduction). All remained stable after 7 months and there has been no late increase in volume.

Conclusions

Significant reduction in arachnoid cyst volume at the order of 30–40% is seen after successful endoscopic fenestration. The cyst volume appears to decrease gradually in the first 3–7 months and reaches a plateau after that. Complete resolution of symptoms in the presence of residual volume may indicate that cyst volume below a threshold may not correlate directly with clinical status.

Keywords

Arachnoid cyst Endoscopic fenestration Volume 
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Notes

Compliance with ethical standards

Conflict of interest

No conflict of interest to report.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Pediatric Neurosurgery“Mitera” Children’s HospitalMarousiGreece
  2. 2.Department of NeurosurgeryRoyal Victoria InfirmaryNewcastle upon TyneUK
  3. 3.National and “Kapodistrian”University of AthensAthensGreece

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