Delayed intracranial hypertension after cranial vault remodeling for nonsyndromic single-suture synostosis

Justin S Cetas1, Morad Nasseri, Targol Saedi

  • 1Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, USA.

Insights

Delayed intracranial hypertension after single-suture synostosis repair is uncommon but can occur. Reoperation for this condition was observed in 6.2% of patients, particularly males undergoing early sagittal synostosis repair.

Area of Science:

  • Pediatric Neurosurgery
  • Craniofacial Surgery
  • Developmental Pediatrics

Background:

  • Delayed intracranial hypertension (ICH) can lead to visual loss and developmental delays after cranial vault remodeling for synostosis.
  • While common in syndromic cases, its incidence in single-suture nonsyndromic synostosis is not well-defined.

Purpose of the Study:

  • To evaluate the frequency of reoperation for delayed intracranial hypertension (ICH) following single-suture nonsyndromic synostosis repair.
  • To identify risk factors associated with the development of delayed ICH in this patient population.

Main Methods:

  • Retrospective analysis of 156 patients undergoing cranial vault remodeling for nonsyndromic single-suture synostosis.
  • Focus on 81 patients with at least 3 years of follow-up for delayed ICH and reoperation.

Main Results:

  • Five out of 81 patients (6.2%) developed delayed ICH requiring reoperation.
  • ICH was confirmed by CT findings and intracranial pressure monitoring.
  • All affected patients were male, undergoing primary repair of isolated sagittal synostoses at age ≤5 months.

Conclusions:

  • Delayed intracranial hypertension sporadically occurs after primary cranial vault reconstruction for single-suture nonsyndromic synostosis.
  • Early sagittal synostosis repair in males under 5 months may be a risk factor for delayed ICH.
Abstract

Related Concept Videos

Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
Sutures of the Skull01:22

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...