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Related Concept Videos

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Updated: Aug 27, 2025

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Persistent Cranial Defects After Endoscopic Sagittal Synostosis Surgery.

Robin T Wu1, Robert M Menard2

  • 1Division of Plastic Surgery, Stanford University School of Medicine, Stanford, CA.

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Incomplete cranial ossification after endoscopic sagittal synostectomy occurred in 3.5% of patients. These cranial defects, though managed with bone grafting, were associated with a higher incidence of developmental concerns.

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Area of Science:

  • Neurosurgery
  • Pediatric Surgery
  • Craniofacial Surgery

Background:

  • Incomplete cranial ossification is a rare but significant complication following calvarial-vault remodeling for sagittal synostosis.
  • The incidence of this complication can range widely, from 0.5% to 18% in previous studies.
  • Reoperation is often necessary to address these ossification defects.

Purpose of the Study:

  • To report the incidence and management of incomplete cranial ossification after endoscopic sagittal synostectomy and barrel stave osteotomies.
  • To evaluate the outcomes of reconstructive surgery for these defects.
  • To explore potential associations between cranial defects and developmental concerns.

Main Methods:

  • Retrospective review of infants with sagittal synostosis treated between 2003 and 2021.
  • Inclusion criteria included endoscopic sagittal synostectomy with barrel stave osteotomies and postoperative helmeting, with follow-up until helmet completion.
  • Data collected included surgical timing, helmet duration, complications, and outcomes of reconstructive procedures.

Main Results:

  • Of 86 eligible patients, 3 (3.5%) developed cranial defects.
  • Patients with defects showed no significant differences in age at surgery, helmeting duration, or perioperative complications compared to those without.
  • However, 100% of patients with cranial defects exhibited developmental concerns, versus 16.9% without. Reconstructive surgery involved bone grafting, bone matrix, and absorbable plates, with variable success.

Conclusions:

  • This study represents the largest series on reoperations for incomplete ossification post-endoscopic sagittal synostectomy with helmet treatment.
  • A 3.5% rate of cranial defects was observed, managed successfully with bone grafting and bone matrix.
  • Poor ossification may correlate with an increased propensity for developmental concerns in affected children.