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Child's Nervous System

, Volume 35, Issue 2, pp 301–308 | Cite as

Radiosurgical treatment of arteriovenous malformations in a retrospective study group of 33 children: the importance of radiobiological scores

  • Jody Filippo CapitanioEmail author
  • Pietro Panni
  • Alberto Luigi Gallotti
  • Carmen Rosaria Gigliotti
  • Francesco Scomazzoni
  • Stefania Acerno
  • Antonella del Vecchio
  • Pietro Mortini
Original Paper
  • 87 Downloads

Abstract

Purpose

Arteriovenous malformations’ (AVMs) obliteration depends on several factors; among the many factors that must be considered to obtain a high rate of obliteration and a low rate of complications, Flickinger-Pollock Score (FPS) seems to have an important role but still have to be validated in the pediatric population while Paddick-Conformity Index (PCI) still has no demonstration of its utility on the outcome and is considered only as a treatment quality marker.

Methods

We retrospectively analyzed 33 consecutive children (2–18 years) with an AVM, treated with stereotactic radiosurgery Gamma Knife (SRS-GK) from 2001 to 2014 in our institution. We assess angiographic (DSA) Obliteration Rate (OR) as well FPS and PCI to draw conclusions.

Results

DSA-OR was 60.6% with a rate of hemorrhage of 0%. median target volume (TV) was 3.60 cc (mean 4.32 ± 3.63; range 0.15–14.2), median PD was 22 Gy (mean 21.4 ± 2.6; range 16.5–25). Median percentage of coverage was 98% (mean 97 ± 3; range 84–100). The median modified FPS was 0.78 (mean 0.89 ± 0.52; range 0.21–2.1) and highly correlate with OR (p = 0.01). The median PCI was 0.65 (mean 0.65 ± 0.14; range 0.34–0.95) A PCI lower than 0.57 highly correlates with final OR (p = 0.02).

Conclusion

SRS-GK was safe and gradually effective in children. A prescription dose-like that used in adult population (i.e. > 18 and between 20 and 25 Gy) is essential to achieve obliteration. A PD of 23 Gy and 22 Gy did impact OR, respectively (p = 0.02) and (p = 0.05). FPS and PCI are valuable scores that seem to correlate with the OR also in the pediatric population although further prospective studies are needed to confirm these observations.

Keywords

Children Gamma knife Pediatric radiosurgery Pediatric brain malformations 

Abbreviations

AVM

Arterovenous malformations

GK

Gamma Knife

SRS

Stereotactic radiosurgery

DSA

Digital subtraction angiography

PD

Prescription dose

OR

Obliteration rate

PCI

Paddick Conformity Index

FPS

Flickinger Pollock Score

MRI

Magnetic resonance imaging

Notes

Compliance with ethical standards

Conflict of interest

All authors certify that they have no affiliationswith or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements) or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jody Filippo Capitanio
    • 1
    Email author
  • Pietro Panni
    • 1
  • Alberto Luigi Gallotti
    • 1
  • Carmen Rosaria Gigliotti
    • 2
  • Francesco Scomazzoni
    • 3
  • Stefania Acerno
    • 1
  • Antonella del Vecchio
    • 2
  • Pietro Mortini
    • 1
  1. 1.Department of Neurosurgery and Gamma Knife UnitIRCCS San Raffaele Scientific InstituteMilanItaly
  2. 2.Department of Medical PhysicsIRCCS San Raffaele Scientific InstituteMilanItaly
  3. 3.Department of NeuroradiologyIRCCS San Raffaele Scientific InstituteMilanItaly

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