Endoscopically assisted versus open repair of sagittal craniosynostosis: the St. Louis Children's Hospital experience

Endoscopic surgery for craniosynostosis: a bibliometric analysis of primary studies

INTRODUCTION

Bibliometrics, a statistical method assessing the influence of scholarly works, was employed to analyze the evolution of endoscopic surgery for craniosynostosis.

METHODS

This comprehensive review followed PRISMA guidelines, sourcing data from PubMed, Embase, and Web of Science, focusing on clinical and surgical outcomes up to December 2023. We identified 1409 records, with 83 papers meeting inclusion criteria.

RESULTS

The majority of studies originated from the Americas (79%), predominantly from the United States (75.9%). The typical study design was retrospective cohort studies (62%), involving a total of 8,175 patients with median research duration of 8 years. Citation metrics indicated an average count of 38.9 per paper, with notable contributions from several key authors. A distinct increase in research was observed in recent years, particularly from 2011 onwards, peaking in 2022 and 2023. The top 10 most cited papers, largely emanating from the U.S., had a higher median patient number (103) compared to the overall median (53), suggesting their significant impact. These papers were primarily published in journals with higher impact factors and citation indicators. The most cited research was notably published in the Journal of Neurosurgery-Pediatrics.

CONCLUSION

This analysis provides a comprehensive view of the field, highlighting the growing trend and clinical importance of endoscopic approaches in craniosynostosis, offering a valuable resource for future research and clinical practice.

The Top 100 Most-Cited Publications in Clinical Craniofacial Research

INTRODUCTION

Craniosynostosis is a birth defect defined as premature closure of sutures leading to possible neurological deficits and cosmetic deformities. Most of the current literature to date focuses on craniosynostosis etiology by analyzing genetics. This paper is a bibliometric analysis of the most influential works related to the clinical management of craniosynostosis to help guide clinicians in their decision-making.

METHODS AND MATERIALS

Clarivate Web of Science database was used to identify the top 100 most-cited articles addressing the clinical management of craniosynostosis. A bibliometric review was performed to analyze publication metrics and track research trends.

RESULTS

The 100 most-cited publications pertaining to craniosynostosis management were cited a cumulative 12,779 times. The highest cited article was Shillito and colleagues' "Craniosynostosis: A Review Of 519 Surgical Patients" with 352 citations. The oldest clinical craniosynostosis article dates back to 1948, and the most recent was published in 2016. The year with the most clinical-focused publications was 2011. The most prolific author was Renier, D. The United States produced 56 of the 100 articles. Most articles (n=52) were level 3 evidence.

DISCUSSION

This bibliometric evaluation of craniosynostosis provides insight into the most impactful literature on this topic. The highest cited articles retrospectively analyze large sample sizes, outline proper evaluation, discuss intervention timelines, and highlight specific treatment plans for this birth defect. By filtering through existing literature, this analysis can guide clinicians on the management of craniosynostosis to maximize patient outcomes.

Long-term results of minimally invasive strip craniectomy without helmet therapy for scaphocephaly - a single-centre experience

Scaphocephaly is the most common type of craniosynostosis and various surgical techniques are used for treatment. Due to late postoperative changes of the head shape, long-term outcome data is important for evaluating any new surgical technique. At our institution, minimally invasive strip craniectomy without regular helmet therapy is the standard treatment in scaphocephalic patients. Between October 2021 and February 2023, we retrospectively examined the skull shape of patients who underwent minimally invasive strip craniectomy for scaphocephaly using a 3D surface scan technique. The cephalic index (CI), the need for helmet therapy and additional cosmetic outcome parameters were investigated. We included 70 patients (72.5% male). The mean follow-up time was 46 (10-125) months and the mean CI was 75.7 (66.7-85.2). In 58 patients, the final cosmetic result was rated as "excellent/good" (mean CI: 76.3; 70.4-85.0), in 11 as "intermediate" (mean CI: 73.3; 66.7-77.6), and in one case as "unsatisfactory" (CI 69.3). The presence of a suboccipital protrusion was associated with a "less than good" outcome. The CI correlated significantly with the overall outcome, the presence of frontal bossing, and the interval between scan and surgery (age at scan). Minimally invasive strip craniectomy is an elegant and safe method to correct scaphocephaly. Our data show good cosmetic results in the long term even without regular postoperative helmet therapy.

Isolated Sagittal Craniosynostosis: A Comprehensive Review

Sagittal craniosynostosis, a rare but fascinating craniofacial anomaly, presents a unique challenge for both diagnosis and treatment. This condition involves premature fusion of the sagittal suture, which alters the normal growth pattern of the skull and can affect neurological development. Sagittal craniosynostosis is characterised by a pronounced head shape, often referred to as scaphocephaly. Asymmetry of the face and head, protrusion of the fontanel, and increased intracranial pressure are common clinical manifestations. Early recognition of these features is crucial for early intervention, and understanding the aetiology is, therefore, essential. Although the exact cause remains unclear, genetic factors are thought to play an important role. Mutations in genes such as FGFR2 and FGFR3, which disrupt the normal development of the skull, are suspected. Environmental factors and various insults during pregnancy can also contribute to the occurrence of the disease. An accurate diagnosis is crucial for treatment. Imaging studies such as ultrasound, computed tomography, magnetic resonance imaging, and three-dimensional reconstructions play a crucial role in visualising the prematurely fused sagittal suture. Clinicians also rely on a physical examination and medical history to confirm the diagnosis. Early detection allows for quick intervention and better treatment outcomes. The treatment of sagittal craniosynostosis requires a multidisciplinary approach that includes neurosurgery, craniofacial surgery, and paediatric care. Traditional treatment consists of an open reconstruction of the cranial vault, where the fused suture is surgically released to allow normal growth of the skull. However, advances in minimally invasive techniques, such as endoscopic strip craniectomy, are becoming increasingly popular due to their lower morbidity and shorter recovery times. This review aims to provide a comprehensive overview of sagittal craniosynostosis, highlighting the aetiology, clinical presentation, diagnostic methods, and current treatment options.

Sagittal Craniosynostosis: Treatment and Outcomes According to Age at Intervention

The purpose of this study is to describe the treatment strategies and outcomes of nonsyndromic single-suture sagittal craniosynostosis based on the patient's age at intervention. Studies from MEDLINE, Scopus, and Cochrane Central Register of Controlled Trials were systematically searched for patients with nonsyndromic single-suture sagittal craniosynostosis. Inclusion criteria encompassed studies with follow-up of at least 12 months, minimum of 25 patients per cohort, and first-time surgical intervention. The risk of bias in nonrandomized studies of intervention tool [Risk Of Bias In Non-randomized Studies-of Interventions (ROBINS-I)] was applied. A total of 49 manuscripts with 3316 patients met criteria. Articles were categorized based on age at intervention; 0 to 6, older than 6 to 12, and older than 12 months. Fifteen of the manuscripts described interventions in more than 1 age group. From the 49 articles, 39 (n=2141) included patients 0 to 6 months old, 15 (n=669) discussed patients older than 6 to 12 months old, and 9 (n=506) evaluated patients older than 12 months old. Follow-up ranged from 12 to 144 months. Over 8 types of open surgical techniques were identified and 5 different minimally invasive procedures were described. Minimally invasive procedures were exclusively seen in the youngest patient cohort, while open cranial vault reconstructions were often seen in the 2 older cohorts. Endoscopic surgery and open conservative procedures are indicated for younger patients, while complex open cranial vault reconstructions are common in older patients. However, there is no consensus on one approach over the other. Even with the analysis of this review, we cannot factor a strong conclusion on a specific technique.

Shared Decision-Making: Process for Design and Implementation of a Decision Aid for Patients With Craniosynostosis

To describe the process of developing a craniosynostosis decision aid.

We conducted a mixed-methods exploratory study between August 2019 and March 2020 to develop a decision aid about surgical treatment for single suture craniosynostosis.

A single tertiary care academic children's hospital.

The decision aid development team consisted of surgeons, research fellows, a clinical nurse practitioner, clinical researchers with expertise in decision science, and a university-affiliated design school. Qualitative interviews (N = 5) were performed with families, clinicians (N = 2), and a helmeting orthotist to provide feedback on decision aid content, format, and usability.

After cycles of revisions and iterations, 3 related decision aids were designed and approved by the marketing arm of our institution. Distinct booklets were created to enable focused discussion of treatment options for the 3 major types of single suture craniosynostosis (sagittal, metopic, unicoronal).

Three decision aids representing the 3 most common forms of single suture craniosynostosis were developed. Clinicians found the decision aids could help facilitate discussions about families' treatment preferences, goals, and concerns.

We developed a customizable decision aid for single suture craniosynostosis treatment options. This tool lays the foundation for shared decision-making by assessing family preferences and providing clear, concise, and credible information regarding surgical treatment. Future research can evaluate this tool's impact on patient-clinician discussions about families' goals and preferences for treatment.

Sagittal Synostectomy With Tension Band Sutures for Correction of Sagittal Craniosynostosis

BACKGROUND AND OBJECTIVES

Premature fusion of the sagittal suture is the most common form of craniosynostosis and can be treated using a variety of open or endoscopic approaches. Existing approaches have varying degrees of effectiveness. Open approaches, whether performed early or late, can be associated with significant blood loss and the need for transfusion. Endoscope-assisted approaches are minimally invasive but require months of postoperative helmet therapy to help remodel the skull. Implantation of springs or distractors requires a second operation for removal of the devices. Here, we present an alternative technique for early correction of sagittal craniosynostosis combining sagittal synostectomy with tension band sutures to remodel the skull without need for transfusion or helmet therapy.

METHODS

We retrospectively reviewed the medical records of all patients treated for sagittal craniosynostosis using a synostectomy with tension band sutures at a single tertiary care institution. Data on patient demographics, operative factors, and postoperative course were collected.

RESULTS

Thirty-four patients underwent the novel procedure. The median preoperative cephalic index was 68 and improved to 76 immediately postoperatively. The median blood loss was 10 mL while the operative duration was 112 minutes. No blood transfusions were needed. One small dural laceration was encountered that was promptly repaired. There were no postoperative complications. Patients presenting for follow-up visits showed continued improvement in head shape and cephalic index.

CONCLUSION

A modified sagittal craniectomy with tension band sutures to remodel the skull is effective in achieving immediate correction of sagittal craniosynostosis. The correction remains durable over long-term follow-up. Importantly, the technique can be performed with minimal blood loss and reduces transfusion risk, operative time, and overall morbidity compared with traditional open approaches while avoiding the need for helmet therapy necessitated by endoscopic approaches.

Craniometric and Aesthetic Outcomes in Craniosynostosis Surgery: A Systematic Review and Meta-Analysis

OBJECTIVE

To systematically review the published comparative aesthetic outcomes, and its determinants, for craniosynostoses surgically treated by minimally-invasive cranial procedures and open cranial vault remodeling (CVR).

DESIGN

PRISMA-compliant systematic review.

SETTING

Not-applicable.

PATIENTS/PARTICIPANTS

Articles were included if they compared spring cranioplasty, strip minimally-invasive craniectomy or CVR for outcomes related to aesthetics or head shape. Forty-two studies were included, comprising 2402 patients.

INTERVENTIONS

None.

MAIN OUTCOME MEASURE(S)

The craniometric and PROM used to determine surgical outcomes.

RESULTS

Twenty-five studies (59%) evaluated sagittal craniosynostosis, with metopic (7;17%) and unicoronal (4;10%) the next most prevalent. Thirty-eight studies (90%) included CVR, 24 (57%) included strip craniectomy with helmeting, 9 (22%) included strip craniectomy without helmeting, 11 (26%) included spring cranioplasty, and 3 (7%) included vault distraction. A majority of studies only used 1 (43%) or 2 (14%) craniometric measures to compare techniques. In sagittal synostosis, 13 (59%) studies showed no difference in craniometric outcomes, 5 (23%) showed better results with CVR, 3 (14%) with strip craniectomy, and 1 (5%) with springs. In studies describing other synostoses, 10/14 (71%) were equivocal. Subjective outcome measures followed similar trends. Meta-analysis shows no significant difference in cranial index (CI) outcomes between CVR and less invasive procedures in patients with sagittal synostosis.

CONCLUSIONS

There is no difference in CI outcomes between CVR and less invasive procedures. The majority of literature comparing craniometric and aesthetic outcomes between CVR and less invasive procedures shows equivocal results for sagittal synostosis. However, the heterogeneity of data for other craniosynostoses did not allow meta-analysis.

Three-Dimensional Assessment of Frontal Bossing and Temporal Pinching in Patients with Sagittal Craniosynostosis Using Curvature Analysis

BACKGROUND

Sagittal craniosynostosis results in varying degrees of frontal bossing and bilateral temporal pinching. This study assessed the three-dimensional changes in these regions using curvature analysis and volumetric analysis before and 1 year after extended sagittal strip craniectomy (ESC) with postoperative helmet therapy.

METHODS

A retrospective review of three-dimensional photographs of 50 subjects treated with ESC with postoperative helmet therapy and 50 age-matched controls was performed. Images were collected preoperatively and 1 year postoperatively. Forehead convexity and temple concavity were quantified. Computed tomographic scans of subjects with and without sagittal synostosis were analyzed to assess the percentage of total intracranial volume (ICV) in the anterior cranial fossa before and after ESC with postoperative helmet therapy.

RESULTS

Forehead convexity in the ESC with postoperative helmet therapy group preoperatively (24.49 ± 3.16 m -1 ) was significantly greater than controls (22.48 ± 3.84 m -1 ; P = 0.005). Forehead convexity significantly decreased after ESC with postoperative helmet therapy (18.79 ± 2.43 m -1 ; P < 0.001) and did not differ from controls (19.67 ± 3.08 m -1 ; P = 0.115). The ESC group had more concave temples preoperatively (-10.27 ± 4.37 m -1 ) as compared with controls (-6.99 ± 3.55 m -1 ; P < 0.001). Temple concavity significantly decreased after ESC (-4.82 ± 3.17 m -1 ; P < 0.001) and did not differ from controls (-5.64 ± 3.27 m -1 ; P = 0.075). In the ESC group, the percentage ICV in the anterior cranial fossa decreased from 22.03% to 18.99% after surgery, whereas the anterior volume in controls was stable (17.74% to 16.81%).

CONCLUSIONS

The ESC group had significantly greater forehead convexity, temple concavity and anterior cranial fossa volume compared with controls. One year after ESC with postoperative helmet therapy, forehead convexity, temple concavity, and percentage ICV in the anterior fossa were comparable to controls.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

Initial UK series of endoscopic suturectomy with postoperative helmeting for craniosynostosis: early report of perioperative experience

BACKGROUND

Endoscopic suturectomy with postoperative helmeting (ESCH) has emerged as a successful treatment for craniosynostosis, initially in North America. We report early outcomes from the first cohort of ESCH patients treated in the United Kingdom (UK).

METHODS

Retrospective cohort study with electronic chart review.

RESULTS

18 consecutive patients from the first ESCH procedure in UK (May 2017) until January 2020 identified. 12 male and 6 female infantsd, with a mean age of 4.6 months (range 2.5-7.8 months) and weight of 6.8 kg (range 4.8-9.8 kg). Diagnoses were metopic (n = 8), unicoronal (n = 7), sagittal (n = 2) and multi-sutural (n = 1) synostoses. Median incision length was 3 cm (range 2-10 cm). 16/18 received no blood products, with 2 (both metopics) requiring transfusion (1 donor exposure). Mean operative time (including anaesthesia) was 96 min (range 40-127 min). Median length of hospital stay was 1 night. 1 surgical complication (superficial infection). All patients are currently undergoing helmet orthosis therapy. So far, no patients have required revisional or squint surgery.

CONCLUSION

Early experience from the first UK cohort of ESCH suggests that this is a safe and well tolerated technique with low morbidity, transfusion and short hospital stay. Long-term results in terms of shape, cosmetic and developmental outcome are awaited.

Flexible endoscope-assisted suture release and barrel stave osteotomy for the correction of sagittal synostosis

OBJECTIVE

Early suturectomy with a rigid endoscope followed by orthotic cranial helmet therapy is an accepted treatment option for single-suture craniosynostosis. To the authors' knowledge, flexible endoscope-assisted suture release (FEASR) has not been previously described. Presented herein is their experience with FEASR for the treatment of isolated sagittal craniosynostosis.

METHODS

A retrospective analysis of the health records of patients who had undergone FEASR between March 2018 and December 2020 was performed. Patients under the age of 6 months who had been diagnosed with isolated sagittal synostosis were considered eligible for FEASR. Exclusion criteria included syndromic synostosis or multiple-suture synostosis. The cephalic index, the primary measure of the cosmetic endpoint, was calculated at prespecified intervals: immediately preoperatively and 6 weeks and 12 months postoperatively. Parental satisfaction with the cosmetic outcome was determined throughout the clinical follow-up and documented according to a structured questionnaire for the first 12 months.

RESULTS

A total of 18 consecutive patients met the criteria for study inclusion. The mean patient age at the time of surgery was 3.4 months (range 2-6 months). All patients underwent a wide craniectomy with no need to convert to an open procedure. The mean craniectomy width was 3.61 cm. Estimated blood loss ranged from 5 to 30 ml. The mean operative time was 75 minutes. No intraoperative complications were observed. The average length of stay was 2.6 days. The mean cephalic index was 67.7 preoperatively, 77.1 at 6 weeks postoperatively, and 76.3 at 1 year postoperatively. The mean percentage change in the cephalic index from preoperatively to the 12-month follow-up was 10.44 (p < 0.001). The mean follow-up was 17 months (range 12-28 months). All parents were satisfied with the cosmetic outcome of the procedure. No patients developed symptoms of raised intracranial pressure (ICP) or needed invasive ICP monitoring during the follow-up period. No patients required reoperation.

CONCLUSIONS

In this modest single-hospital series, the authors demonstrated the feasibility of FEASR in treating sagittal synostosis with favorable cosmetic outcomes. The morbidity profile and resource utilization of the procedure appear similar to those of procedures conducted via traditional rigid endoscopy.

Persistent Cranial Defects After Endoscopic Sagittal Synostosis Surgery

INTRODUCTION

Incomplete cranial ossification is a rare complication of calvarial-vault remodeling for sagittal synostosis often requiring reoperation. Studies show an incidence ranging from 0.5% to 18%.

METHODS

Infants with sagittal synostosis who underwent endoscopic sagittal synostectomy and barrel stave osteotomies with postoperative orthotic helmeting between 2003 and 2021 were included with minimum follow-up until the completion of helmeting.

RESULTS

Of 90 patients, 86 met inclusion; 3 had defects (3.5%). Patients with and without cranial defects had no difference in age of surgery (113 versus 131 d), duration helmeting (6.6 versus 7.0 mo), or perioperative/postoperative complications. Two underwent reoperation for recurrence. Patients with cranial defects manifested the evidence of developmental concerns more than patients without (100% versus 16.9%).The average cranial defect size was 19.33 cm 2 and age at surgery 4.29 years. All were managed with cranial particulate bone grafting with addition of bone matrix and SonicWeld plate. The first had 6×6 cm posterior defect requiring cranioplasty at 4.86 years with excellent healing. The second had a 3×6 cm posterior and 1×1 cm anterior defect, underwent cranioplasty at 4.14 years with persistent 4×6 defect, requiring repeat cranioplasty at 5.3 years. The third had a 3×5 cm posterior defect and underwent cranioplasty at 3.88 years with continued defect, planning for repeat intervention.

CONCLUSIONS

This is the largest documented series of reoperations for incomplete ossification after endoscopic sagittal synostectomy with postoperative helmet treatment. The authors report a 3.5% rate of cranial defects, managed with bone grafting, bone matrix, and absorbable plates. Patients with poor ossification may have a propensity toward developmental concerns.

Impact of age at endoscopic metopic synostosis repair on anthropometric outcomes

OBJECTIVE

Endoscopic strip craniectomy for metopic craniosynostosis relies on rapid growth and postoperative helmeting for correction. Endoscopic repair is generally performed before patients reach 4 months of age, and outcomes in older patients have yet to be quantified. Here, the authors examined a cohort of patients treated with endoscopic repair before or after 4 months of age to determine aesthetic outcomes of delayed repairs.

METHODS

Data from eligible patients were retrospectively assessed and aggregated in a dedicated metopic synostosis database. Inclusion criteria were radiographically confirmed metopic synostosis and endoscopic treatment. Patients were dichotomized into two groups: those younger than 4 months and those 4 months or older at the time of repair. The frontal width and interfrontal divergence angle (IFDA) were measured on reconstructed CT images. These measurements, alongside operative time, estimated blood loss, and transfusion rates, were compared between groups using the Student t-test or chi-square test.

RESULTS

The study population comprised 28 patients treated before 4 months of age and 8 patients treated at 4-6 months of age. Patient sex and perioperative complications did not differ by age group. Older age at repair was not significantly associated with 1-year postoperative IFDA (140° ± 4.2° vs 142° ± 5.0°, p = 0.28) or frontal width (84 ± 5.2 vs 83 ± 4.4 mm, p = 0.47).

CONCLUSIONS

One-year postoperative IFDA and frontal width do not differ significantly between patients treated before and after 4 months of age. Further study with longer follow-up is necessary to confirm the longevity of these results at skeletal maturity.

A multi-institutional survey on calvarial vault remodeling techniques for sagittal synostosis and outcomes analysis for patients treated at 12 months and older

OBJECTIVE

Surgical treatment of sagittal craniosynostosis is challenging in older patients. This study aimed to assess the effect of increasing age on open surgical technique selection and patient outcomes using the multi-institutional Synostosis Research Group (SynRG) collaboration.

METHODS

Surgeons in SynRG were surveyed for key influences on their preferred open calvarial vault remodeling techniques at various patient ages: < 6, 6-12, and > 12 months. The SynRG database was then queried for open repairs of nonsyndromic sagittal craniosynostosis performed for patients older than 12 months of age. Perioperative measures, complications, and preoperative and postoperative cephalic indices were reviewed.

RESULTS

All surgeons preferred to treat patients at an earlier age, and most (89%) believed that less-optimal outcomes were achieved at ages older than 12 months. The modified pi procedure was the dominant technique in those younger than 12 months, while more involved open surgical techniques were performed for older patients, with a wide variety of open calvarial vault remodeling techniques used. Forty-four patients met inclusion criteria, with a mean (± SD) age at surgery of 29 ± 16 months. Eleven patients underwent parietal reshaping, 10 parietal-occipital switch, 9 clamshell craniotomy, 7 geometric parietal expansion, 6 modified pi procedure, and 1 parietal distraction. There were no readmissions, complications, or mortality within 30 days postoperatively. Patients' cephalic indices improved a mean of 6.4% ± 4.0%, with a mean postoperative cephalic index of 74.2% ± 4.9%. Differences in postoperative cephalic index (p < 0.04) and hospital length of stay (p = 0.01) were significant between technique cohorts. Post hoc Tukey-Kramer analysis identified the parietal reshaping technique as being significantly associated with a reduced hospital length of stay.

CONCLUSIONS

Patient age is an important driver in technique selection, with surgeons selecting a more involved calvarial vault remodeling technique in older children. A variety of surgical techniques were analyzed, with the parietal reshaping technique being significantly associated with reduced length of stay; however, multiple perioperative factors may be contributory and require further analysis. When performed at high-volume centers by experienced pediatric neurosurgeons and craniofacial surgeons, open calvarial vault techniques can be a safe method for treating sagittal craniosynostosis in older children.

Endoscopic strip craniectomy with molding helmet therapy versus spring-assisted cranioplasty for nonsyndromic single-suture sagittal craniosynostosis: a systematic review

OBJECTIVE

Endoscopic strip craniectomy with postoperative molding helmet therapy (ESC-H) and spring-assisted cranioplasty (SAC) are commonly used minimally invasive techniques for correction of nonsyndromic sagittal craniosynostosis, but it is unclear which, if either, is superior. Therefore, the authors undertook a systematic review to compare ESC-H with SAC for the surgical management of nonsyndromic single-suture sagittal craniosynostosis.

METHODS

Studies were identified through a systematic and comprehensive search of four databases (Embase, MEDLINE, and two databases in the Cochrane Library). Databases were searched from inception until February 19, 2021. Pediatric patients undergoing either ESC-H or SAC for the management of nonsyndromic single-suture sagittal craniosynostosis were included. Systematic reviews and meta-analyses, single-patient case reports, mixed cohorts of nonsyndromic and syndromic patients, mixed cohorts of different craniosynostosis types, and studies in which no outcomes of interest were reported were excluded. Outcomes of interest included reoperations, blood transfusion, complications, postoperative intensive care unit (ICU) admission, operative time, estimated blood loss, length of hospital stay, and cephalic index. Pooled summary cohort characteristics were calculated for each outcome of interest. Methodological quality was assessed using the Newcastle-Ottawa Scale. The study was reported in accordance with the 2020 PRISMA statement.

RESULTS

Twenty-two studies were eligible for inclusion in the review, including 1094 patients, of whom 605 (55.3%) underwent ESC-H and 489 (44.7%) underwent SAC for nonsyndromic sagittal craniosynostosis. There was no difference between the pooled estimates of the ESC-H and SAC groups for operative time, length of stay, estimated blood loss, and cephalic index. There was no difference between the groups for reoperation rate and complication rate. However, ESC-H was associated with a higher blood transfusion rate and higher postoperative ICU admission.

CONCLUSIONS

The available literature does not demonstrate superiority of either ESC-H or SAC, and outcomes are broadly similar for the treatment of nonsyndromic sagittal craniosynostosis. However, the evidence is limited by single-center retrospective studies with low methodological quality. There is a need for international multicenter randomized controlled trials comparing both techniques to gain definitive and generalizable data.

Historical Perspectives on the Management of Craniosynostosis

The history of craniofacial surgery is one of many fundamental advances by monumental figures. Although craniosynostosis has been known to exist for multiple centuries, modern management has evolved over roughly the last century. An overview of early history, early scientific exploration, the advancement of surgical treatment of craniofacial deformities and the current state of craniosynostosis management is discussed. To fully appreciate the evolution of craniosynostosis surgery, one must understand the gradual advancements that have brought the specialty to this modern era.

Modified endoscopic strip craniectomy technique for sagittal craniosynostosis: provides comparable results and avoids bony defects

PURPOSE

This study describes a modified technique addressing bony defects and incomplete ossification after endoscopic strip craniectomy (ESC) for SC followed by postoperative helmet therapy (PHT). The study aims to delineate quantitative and qualitative outcomes of this modified ESC technique followed by PHT and discern the optimal duration of PHT following ESC. A secondary aim is to address the effects of the technique on bony defects.

METHODS

Patients undergoing ESC followed by PHT between 2017 and 2021 were included. Patient sex, age at surgery, duration of surgery, red blood cell transfusion, length of hospital stay, PHT duration, cephalic index (CI) at multiple time points, and bony defect information were collected. Descriptive and correlative analysis was done.

RESULTS

Thirty-one patients (25 male, 6 female) were operated in study period. Mean age at surgery was 12.81 weeks, mean duration of surgery was 57.50 min, average transfused RBC volume was 32 cc, mean length of hospital stay was 1.84 days, mean PHT duration was 33.16 weeks, and mean follow-up time was 63.42 weeks. Mean preoperative CI was 70.6, and mean CI at the end of PHT was significantly higher, being 77.1. Maximum improvement in CI (CI_max) took place at week 22.97. PHT duration did not have a correlation with CI at last follow up. There were no bony defects.

CONCLUSION

Modified ESC technique is effective in successful correction of sagittal craniosynostosis. CI_max already takes place, while PHT is continuing, but there is no certain time point for dishelmeting. The technique avoided bony defects and incomplete ossification.

Neurocognitive outcomes of children with non-syndromic single-suture craniosynostosis

While the focus of craniosynostosis surgery is to improve head shape, neurocognitive sequelae are common and are incompletely understood. Neurodevelopmental problems that children with craniosynostosis face include cognitive and language impairments, motor delays or deficits, learning disabilities, executive dysfunction, and behavioral problems. Studies have shown that children with multiple suture craniosynostosis have more impairment than children with single-suture craniosynostosis. Children with isolated single-suture subtypes of craniosynostosis such as sagittal, metopic, and unicoronal craniosynostosis can have distinct neurocognitive profiles. In this review, we discuss the unique neurodevelopmental profiles of children with single-suture subtypes of craniosynostosis.

Endoscopic treatment of sagittal suture synostosis - a critical analysis of current management strategies

While many centers nowadays offer minimally invasive techniques for the treatment of single suture synostosis, surgical techniques and patient management vary significantly. We provide an overview of how scaphocephaly treated with endoscopic techniques is managed in the reported series and analyze the crucial steps that need to be dealt with during the management process. We performed a review of the published literature including all articles that examined sagittal-suture synostosis treated with endoscopic techniques as part of single- or multicenter studies. Fourteen studies reporting results of 885 patients were included. We identified 5 key steps in the management of patients. A total of 188 patients were female and 537 male (sex was only specified in 10 articles, for 725 included patients, respectively). Median age at surgery was between 2.6 and 3.9 months with a total range from 1.5 to 7.0 months. Preoperative diagnostics included clinical and ophthalmologic examinations as well as neuropsychological and genetic consultations if needed. In 5 publications, a CT scan was routinely performed. Several groups used anthropometric measurements, mostly the cephalic index. All groups analyzed equally recommended to perform endoscopically assisted craniosynostosis surgery with postoperative helmet therapy in children < 3 months of age, at least for non-syndromic cases. There exist significant variations in surgical techniques and patient management for children treated endoscopically for single suture sagittal synostosis. This heterogeneity constitutes a major problem in terms of comparability between different strategies.

Superior Long-term Appearance of Strip Craniectomy Compared with Cranial Vault Reconstruction in Metopic Craniosynostosis

Background:

Strip craniectomy with orthotic helmet therapy (SCOT) is an increasingly supported treatment for metopic craniosynostosis, although the long-term efficacy of deformity correction remains poorly defined. We compared the longterm outcomes of SCOT versus open cranial vault reconstruction (OCVR).

Methods:

Patients who underwent OCVR or SCOT for isolated metopic synostosis with at least 3 years of follow-up were identified at our institution. Anthropometric measurements were used to assess baseline severity and postoperative skull morphology. Independent laypersons and craniofacial surgeons rated the appearance of each patient’s 3D photographs, compared to normal controls.

Results:

Thirty-five patients were included (15 SCOT and 20 OCVR), with similar follow-up between groups (SCOT 7.9 ± 3.2 years, OCVR 9.2 ± 4.1 years). Baseline severity and postoperative anthropometric measurements were equivalent. Independent adolescent raters reported that the forehead, eye, and overall appearance of SCOT patients was better than OCVR patients (P < 0.05, all comparisons). Craniofacial surgeons assigned Whitaker class I to a greater proportion of SCOT patients with moderate-to-severe synostosis (72.2 ± 5.6%) compared with OCVR patients with the same severity (33.3 ± 9.2%, P = 0.02). Parents of children who underwent SCOT reported equivalent satisfaction with the results of surgery (100% versus 95%, P > 0.99), and were no more likely to report bullying (7% versus 15%, P = 0.82).

Conclusions:

SCOT was associated with superior long-term appearance and perioperative outcomes compared with OCVR. These findings suggest that SCOT should be the treatment of choice for patients with a timely diagnosis of metopic craniosynostosis.

The use of a single-piece bone flap for cranial reshaping in anterior craniosynostosis patients: clinical experience and a description of a novel technique

Background

Craniosynostosis is known as premature closure of one or more of the cranial sutures. Anterior craniosynostosis involves anterior plagiocephaly and trigonocephaly. One of the issues in anterior craniosynostosis skull reshaping is maintaining an aesthetically pleasing forehead curve. Therefore, in this article, we demonstrate our novel technique to use a single-piece bone flap for cranial reshaping of the anterior mold in patients diagnosed with anterior craniosynostosis. A retrospective record review of patients who underwent single piece bone flap cranial reshaping for correction of unicoronal synostosis (UCS) and metopic synostosis (MS) at an Academic Institute in Riyadh, Saudi Arabia, between 2018 and 2020, was conducted.

Results

Six non-syndromic consecutive patients were included. Three of the patients had MS. The mean age at surgery was 11.16 months (range, 6–19 months). The average OR time was 315 min (range, 263–368 min). The average intraoperative blood loss was 225 ml (range, 100–400 ml). All patients had achieved acceptable functional and aesthetic results.

Conclusion

Our novel technique is an innovative and efficient reconstructive technique to simultaneously address MS and UCS and minimize intraoperative bleeding and surgery time. However, more studies with more cases are required.

Disparities in Craniosynostosis Outcomes by Race and Insurance Status

ABSTRACT

Disparities in access to care for surgical intervention in craniosynostosis have been suggested as a cause in discrepancies between the surgical approach and consequently perioperative outcomes following surgery. This work aimed to investigate the influence of race, insurance status, and the presence of craniosynostosis-related conditions on the short-term outcomes after the surgical management of craniosynostosis. Using the National Inpatient Sample database for the years 2010 to 2012, sociodemographic predictors for 30-day postoperative complication rates and requirements for blood transfusion in craniosynostosis surgeries were identified. Medicaid patients were significantly more likely to experience complications (P = 0.013) and higher rates of blood transfusions (P = 0.011). Compared to those without any complications, patients who experienced postoperative complications and blood transfusions were older (191.5 versus 181.7 days old, P < 0.001), had a greater number of chronic diseases (P < 0.001), and had a longer average length of stay (P < 0.001). On multivariable regression, Medicaid patients were 1.7 times more likely to experience any postoperative complication compared to privately insured patients. White patients also experienced a 0.741 times lower likelihood of requiring a blood transfusion. At the hospital level, receiving surgery at government-operated hospitals was found to be a protective factor for postoperative complications compared to for-profit private (P = 0.016) and nonprofit private (P = 0.028). Healthcare providers and policy makers should be cognizant of these sociodemographic disparities and their potential causes to ensure equitable treatment for all patients regardless of insurance status and racial/ethnic background.

Predictors of Blood Transfusion for Endoscopic Assisted Craniosynostosis Surgery

ABSTRACT

Blood loss is a main cause of morbidity after craniofacial procedures. The purpose of this study is to identify the incidence and predictors for transfusion of blood products in the endoscopic assisted strip craniectomy population. Data was prospectively collected from a single-center multi-surgeon cohort of 78 consecutive patients who underwent endoscopic assisted strip craniectomy for craniosynostosis between July 2013 and December 2020. The authors reviewed patient and treatment characteristics and outcomes. Of the 78 patients, 26 patients were transfused yielding an overall rate of transfusion of 33%. The most common fused suture was sagittal (n = 42, 54%) followed by metopic (n = 15, 19%), multiple (n = 10, 13%), coronal (n = 7, 9%) and finally lambdoid (n = 4, 5%). On univariate analysis, patients' weight in the transfusion cohort were significantly lower than those who did not receive a transfusion (5.6 ± 1.1 versus 6.5 ± 1.1 kg, P = 0.0008). The transfusion group also had significantly lower preoperative hemoglobin compared to the non-transfusion group (10.6 versus 11.1, P = .049). Eleven percent patients admitted to step-down received a transfusion, whereas 39% of patients admitted to the pediatric intensive care unit received a transfusion (P = 0.042). On multivariate analysis, only higher patient weight (operating room [OR] 0.305 [0.134, 0.693], P = 0.005) was protective against a transfusion, whereas colloid volume (OR 1.018 [1.003, 1.033], P = 0.019) predicted the need for a transfusion. Our results demonstrate that endoscopic craniosynostosis cases carry a moderate risk of transfusion. Individuals with lower weight and those that receive colloid volume are also at elevated risk.

Socioeconomic Factors Impact the Timing of Surgical Repair for Craniosynostosis - A Regional and National Assessment

INTRODUCTION

Timing of repair for patients with craniosynostosis are usually categorized into early "minimally invasive" surgeries such as strip craniotomy (SC), whereas those presenting later undergoing traditional cranial vault remolding (CVR). The impact that sociodemographic and socioeconomic disparities have on time to presentation for craniosynostosis and treatment is unknown. Herein, we examined sociodemographic and socioeconomic factors among a heterogenous patient population at a single institution who underwent craniosynostosis repair and compared this cohort to a national database.

METHODS

A retrospective review of patients at UTHealth who underwent craniosynostosis repair from 2016 to 2020 was performed. The patients were divided into cohorts based on type of operation: SC or cranial vault remolding. The Kid Inpatient Database (KID) database was used to assess sociodemographic factors in relation to craniosynostosis. Univariate and multivariate logistic regression were used to determine significant predictors and differences.

RESULTS

Single Institution (Regional): Compared with non-Hispanic white (NHW) patients, Hispanic (OR 0.11), and Non-Hispanic Black (NHB) (OR 0.14) had lower odds of undergoing SC. Compared to those on private insurance, patients on Medicaid (OR 0.36) had lower odds of undergoing SC. Using zip code median income levels, patients with a higher median income level had slightly higher odds of undergoing SC compared to patients with a lower median income (OR 1.000025).KIDS (National): Compared with non-Hispanic white patients, NHB (OR 0.32) and Asian (OR 0.47) patients had lower odds of undergoing repair before the age of 1. Compared to patients with private insurance, those with Medicaid (OR 0.67) and self-pay (OR 0.58) had lower odds of undergoing repair before the age of 1. Patients in the lowest income quartile (OR 0.68) and second lowest income quartile (OR 0.71) had lower odds of undergoing repair before the age of 1 compared to the highest quartile.

CONCLUSIONS

Our findings indicate that sociodemographic and socioeconomic factors may play a role in diagnosis of craniosynostosis and access to care. Patients of NHB and Hispanic race, lower income quartiles by zip code, and those that use public insurance are less likely to undergo early repair, both nationally and at our institution. Further research is needed to delineate the casualty of this disparity in presentation and timing of surgery.

Correction of Metopic Craniosynostosis Using Limited Incision Strip Craniectomy Versus Open Fronto-Orbital Reconstruction: An Assessment of Aesthetic Outcomes

BACKGROUND

Metopic craniosynostosis is traditionally repaired with fronto-orbital advancement (FOA) or, alternatively, limited short scar strip craniectomy (LSSSC) followed by helmet therapy. There is controversy among surgeons regarding resultant head shape outcomes between the 2 methods. This study aims to assess how surgeons perceive the postoperative aesthetic results of the 2 metopic craniosynostosis repair methods.

METHODS

A retrospective analysis was performed on 13 (n = 6 LSSSC; n = 7 FOA) patients who presented for surgical correction of isolated metopic craniosynostosis via either LSSSC (followed by helmet therapy) or FOA. Clinical photographs at 1 year postop were shown to 10 craniofacial surgeons who rated the aesthetic outcomes on a Likert scale of 1 (poor) to 5 (excellent) and guessed which surgical method was performed.

RESULTS

Mean age at the time of the procedure was younger in LSSSC than FOA (3.1 ± 1.0 versus 17.5 ± 8.5 months; P < 0.001). Mean blood loss was significantly lower with LSSSC versus FOA (202.0 ± 361.2 versus 371.43 ± 122.9 mL; P < 0.001), as was mean blood transfusion requirement (92.5 ± 49.9 versus 151.3 ± 51.2 mL; P < 0.001) and mean duration of the operation (3:06 ± 0:24 versus 7:53 ± 0:31 hours; P < 0.001). Mean surgeon scores of aesthetic outcomes were similar between groups: LSSSC, 3.27 ± 1.09; FOA, 3.51 ± 0.95 (P = 0.171). When asked to identify which procedure patients had received, only 63.8% of responses were correct.

CONCLUSIONS

Limited short scar strip craniectomy offers an important alternative to traditional open FOA and should be considered as an option for children diagnosed with metopic craniosynostosis.

Comparison of aesthetic outcomes between open and endoscopically treated sagittal craniosynostosis

OBJECTIVE

In the last several decades, there has been much debate regarding the ideal treatment for sagittal synostosis. The purpose of this study was to compare perioperative, anthropometric, and subjective assessments of cosmetic outcomes between open and endoscopic management of isolated sagittal synostosis.

METHODS

At their routine postoperative follow-up, pediatric patients with sagittal craniosynostosis were recruited to undergo digital cranial measurement and standardized photography for objective and subjective assessments of perioperative outcomes. Age-normalized z-scores for cephalic index, head circumference, euryon-euryon diameter (Eu-Eu), and glabella-opisthocranion diameter (G-Op) were calculated for each patient. Faculty surgeons, surgical trainees, nurses, and laypersons were asked to rate the normalcy of craniofacial appearances using a 5-point Likert scale. Outcomes were compared between patients treated with endoscopic correction and those treated with open repair.

RESULTS

A total of 50 patients were included in the study. Thirty-one had undergone open surgical correction, and 19 had undergone endoscopic treatment. Endoscopic repair involved significantly lower operative time, blood loss, transfusion rate, and hospital length of stay than those with open repair (p < 0.001). There was no significant difference between groups in terms of z-scores for head circumference (p = 0.22), cephalic index (p = 0.25), or Eu-Eu (p = 0.38). Endoscopic treatment was associated with a significantly lower G-Op (p = 0.009). Additionally, the average subjective rating of head shape was higher for endoscopic treatment when corrected for age, gender, and ethnicity (p = 0.02).

CONCLUSIONS

The study findings suggest that patients who are treated endoscopically may have an overall more normal appearance in skull morphology and cosmesis, although these results are limited by poor reliability.

Spring-mediated cranioplasty versus endoscopic strip craniectomy for sagittal craniosynostosis

OBJECTIVE

Endoscopic strip craniectomy (ESC) and spring-mediated cranioplasty (SMC) are two minimally invasive techniques for treating sagittal craniosynostosis in early infancy. Data comparing the perioperative outcomes of these two techniques are sparse. Here, the authors hypothesized that outcomes would be similar between patients undergoing SMC and those undergoing ESC and conducted a study using the multicenter Pediatric Craniofacial Surgery Perioperative Registry (PCSPR).

METHODS

The PCSPR was queried for infants under the age of 6 months who had undergone SMC or ESC for sagittal synostosis. SMC patients were propensity score matched 1:2 with ESC patients on age and weight. Primary outcomes were transfusion-free hospital course, intensive care unit (ICU) admission, ICU length of stay (LOS), and hospital length of stay (HLOS). The authors also obtained data points regarding spring removal. Comparisons of outcomes between matched groups were performed with multivariable regression models.

RESULTS

The query returned data from 676 infants who had undergone procedures from June 2012 through September 2019, comprising 580 ESC infants from 32 centers and 96 SMC infants from 5 centers. Ninety-six SMC patients were matched to 192 ESC patients. There was no difference in transfusion-free hospital course between the two groups (adjusted odds ratio [aOR] 0.78, 95% CI 0.45-1.35). SMC patients were more likely to be admitted to the ICU (aOR 7.50, 95% CI 3.75-14.99) and had longer ICU LOSs (incident rate ratio [IRR] 1.42, 95% CI 1.37-1.48) and HLOSs (IRR 1.28, 95% CI 1.17-1.39).

CONCLUSIONS

In this multicenter study of ESC and SMC, the authors found similar transfusion-free hospital courses; however, SMC infants had longer ICU LOSs and HLOSs. A trial comparing longer-term outcomes in SMC versus ESC would further define the roles of these two approaches in the management of sagittal craniosynostosis.

Open Repair Versus Closed Repair: A Cost-Analysis of the Two Surgical Approaches for the Treatment of Craniosynostoses

PURPOSE

The purpose of this study was to quantify the hospitalization charges of the 2 general surgical approaches in the treatment of craniosynostosis and determine if there was a significant difference between the 2. Several studies compared them side-by-side according to specific variables, such as success rates, postoperative complications, blood loss, and length of stay, but were limited by small sample sizes.

METHODS

This is a retrospective cohort study that was conducted using the Kids' Inpatient Database (KID). All patients diagnosed with craniosynostosis (Q75.0) were identified. The procedures were grouped according to the approach taken, whether it was a traditional, open approach, or a closed, minimally invasive approach. The primary predictor variable was the surgical approach (open vs closed). The outcome variables were the hospital charges (US dollars) and length of stay (days). Statistical analyses were based on the univariate and multivariate linear regression models, and P value less than .05 marked the significance level.

RESULTS

Among a sample of 2,585 cases, an open approach was employed in 2,353 cases and a closed approach in 232 cases. Race, payer information, hospital region, admission status (elective vs not elective), patient location, and surgical approach (open vs closed) were all significant predictors (P < .15) of increased hospitalization charges. Relative to white patients, being in the 'other' racial class added $10,987 in hospital charges (P < .05). Relative to the Northeast, being a patient in the West added $33,459 in hospital charges (P < .01). Not being admitted electively added $72,572 (P < .01) relative to elective admissions. Finally, open repair added $59,539 (P < .01) in charges relative to closed repair.

CONCLUSIONS

The traditional open approach added nearly $60,000 to the cost of the procedure when compared with the closed, endoscopic approach. The scope and invasiveness of the open approach demand greater surgical services, hospital services, supplies, and equipment, ultimately contributing to this increased cost.

Three-Dimensional Treatment Outcomes of a Virtual Helmet Design Protocol for Sagittal Strip Craniectomy

BACKGROUND

The helmet worn after sagittal strip craniectomy must be customized to the surgical procedure and the patient's anatomy to achieve optimal outcomes. This study compares three-dimensional head shape outcomes obtained from a novel virtual helmet design and from a traditional helmet design.

METHODS

Twenty-four patients underwent extended sagittal strip craniectomy performed by a single surgeon and helmet management performed by a single orthotist. Eleven patients constitute the traditional helmet group, with helmet design based on laser scans. Thirteen patients constitute the virtual helmet group, with helmet design based on an overlay of a three-dimensional volume rendering of a low-radiation protocol computed tomographic scan and three-dimensional photograph. Cephalic index and vertical height were recorded from three-dimensional photographs. Three-dimensional whole-head composite images were generated to compare global head shape outcomes to those of age-matched controls.

RESULTS

There was no significant difference in mean cephalic index between the virtual helmet group (83.70 ± 2.33) and controls (83.53 ± 2.40). The differences in mean cephalic index between the traditional helmet group (81.07 ± 3.37) and controls and in mean vertical height were each significant (p < 0.05). Three-dimensional analysis demonstrated normal biparietal and vertical dimensions in the virtual helmet group compared to controls. The traditional helmet group exhibited narrower biparietal dimension and greater vertical dimension compared to controls.

CONCLUSIONS

Traditional and virtual helmet protocols improved mean cephalic index, but the virtual helmet group yielded more consistent and greater change in cephalic index. The virtual helmet design protocol yielded three-dimensional outcomes similar to those of age-matched controls. Traditional helmet design yielded a narrower biparietal dimension and greater vertical dimension to the cranial vault compared to the virtual helmet group and controls.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, III.

Endoscopic-assisted repair for sagittal synostosis

The craniofacial team at St. Louis Children's Hospital has been performing endoscopy-assisted synostosis surgery since 2006. Most infants with single-suture synostosis younger than 6 months of age are candidates. The sphinx position is used, with two incisions: one posterior to the bregma and one anterior to the lambda. The endoscope is incorporated primarily for epidural dissection and bone edge cauterization. Blood products are available but rarely needed with single suturectomies. Patients are managed on the floor after surgery and discharged to home on postoperative day 1, with helmet therapy coordinated and initiated immediately after surgery and continued until about 12 months of age.

The video can be found here: https://vimeo.com/513939623

Management of sagittal synostosis in the Synostosis Research Group: baseline data and early outcomes

OBJECTIVE

Sagittal synostosis is the most common form of isolated craniosynostosis. Although some centers have reported extensive experience with this condition, most reports have focused on a single center. In 2017, the Synostosis Research Group (SynRG), a multicenter collaborative network, was formed to study craniosynostosis. Here, the authors report their early experience with treating sagittal synostosis in the network. The goals were to describe practice patterns, identify variations, and generate hypotheses for future research.

METHODS

All patients with a clinical diagnosis of isolated sagittal synostosis who presented to a SynRG center between March 1, 2017, and October 31, 2019, were included. Follow-up information through October 31, 2020, was included. Data extracted from the prospectively maintained SynRG registry included baseline parameters, surgical adjuncts and techniques, complications prior to discharge, and indications for reoperation. Data analysis was descriptive, using frequencies for categorical variables and means and medians for continuous variables.

RESULTS

Two hundred five patients had treatment for sagittal synostosis at 5 different sites. One hundred twenty-six patients were treated with strip craniectomy and 79 patients with total cranial vault remodeling. The most common strip craniectomy was wide craniectomy with parietal wedge osteotomies (44%), and the most common cranial vault remodeling procedure was total vault remodeling without forehead remodeling (63%). Preoperative mean cephalic indices (CIs) were similar between treatment groups: 0.69 for strip craniectomy and 0.68 for cranial vault remodeling. Thirteen percent of patients had other health problems. In the cranial vault cohort, 81% of patients who received tranexamic acid required a transfusion compared with 94% of patients who did not receive tranexamic acid. The rates of complication were low in all treatment groups. Five patients (2%) had an unintended reoperation. The mean change in CI was 0.09 for strip craniectomy and 0.06 for cranial vault remodeling; wide craniectomy resulted in a greater change in CI in the strip craniectomy group.

CONCLUSIONS

The baseline severity of scaphocephaly was similar across procedures and sites. Treatment methods varied, but cranial vault remodeling and strip craniectomy both resulted in satisfactory postoperative CIs. Use of tranexamic acid may reduce the need for transfusion in cranial vault cases. The wide craniectomy technique for strip craniectomy seemed to be associated with change in CI. Both findings seem amenable to testing in a randomized controlled trial.

Sagittal synostosis scaphocephaly cranial reconstruction with spiral cut cranioplasty

Sagittal craniosynostosis, the most common form of craniosynostosis, affects 1 per 1000 live births. The main surgical treatments include endoscopic suturectomy and open cranial vault remodeling. This video describes an open reconstruction method, including strip resection of the sagittal suture, biparietal craniotomies with spiral cut cranioplasty, and barrel staves of the posterior occiput. Ideally used between 4 and 15 months of age, this approach takes advantage of the flexibility of the cranial bones to expand, allowing for immediate and long-term increases of the parietal width and correction of cosmetic deformity, without necessitating the use of cranial molding devices postoperatively.

The video can be found here: https://vimeo.com/516699203

Objective Craniometric Versus Subjective Outcome Ratings in Endoscopic and Open Sagittal Synostosis Surgery

BACKGROUND

Despite advances in surgical treatments and assessments of objective outcomes in surgery for sagittal synostosis, there is no agreement regarding the optimal assessment of postoperative outcomes. Additionally, few studies have evaluated subjective assessments of cranial morphology after surgical correction. This study sought to evaluate the utility of subjective aesthetic outcome assessment and compare these assessments to established craniometric outcomes in patients undergoing surgery for isolated sagittal synostosis.

METHODS

Nineteen raters (5 parents, 4 surgeons, 5 trainees and 5 nurses) evaluated fifty patients who underwent surgical correction of isolated sagittal synostosis using standardized postoperative patient photos and a five-point Likert scale. Previously established anthropomorphic measurements were recorded postoperatively in these same patients and comparisons were made between the objective anthropomorphic and subjective outcome evaluations.

RESULTS

There were no statistically significant correlations between age-controlled cephalic index, head circumference, or euryon-euryon diameter and subjective aesthetic scores. Lay persons assigned a significantly lower proportion of scores (37.9%) as middle values (2, 3, or 4) compared with faculty (64.8%). There was a statistically significant association between high scores given by surgical faculty and laypersons (P < 0.001).

CONCLUSIONS

Subjective measurement of cosmetic outcome is a useful metric in surgical correction of craniosynostosis. Although no correlations were found between objective measurements and subjective aesthetic scores, cosmetic assessments by surgeons demonstrated strong correlation with lay perception, indicating that these ratings may be a good gauge of overall cosmetic outcome. When used in combination, objective and subjective measurements provide unique value to assess outcomes after surgery for craniosynostosis.

Comparison of Perioperative Outcomes and Parental Satisfaction Outcomes of Strip Craniectomy with Postoperative Helmet versus Spring-Mediated Remodeling in Sagittal Craniosynostosis

INTRODUCTION

We sought to compare outcomes and parental satisfaction between 2 approaches for sagittal craniosynostosis: strip craniectomy with spring-mediated skull remodeling (SMSR) and strip craniectomy with postoperative helmet (SCH).

METHODS

Perioperative and outcome data for SMSR or SCH patients between September 2010 and July 2019 were retrospectively reviewed. A telephone survey was administered to parents of children who underwent both procedures.

RESULTS

A total of 62 children were treated for sagittal craniosynostosis by either SMSR (n = 45) or SCH (n = 17). The SCH group had a lower estimated blood loss (27 vs. 47.06 mL, p = 0.021) and age at surgery (13.0 vs. 19.8 weeks) than the SMSR group. Three patients underwent early springs removal due to trauma or dislodgement, all of whom converted to helmeting. Of the 62 children initially identified, 59 were determined to have an adequate follow-up time to assess long-term outcomes. The mean follow-up time was 30.1 months (n = 16) in the SCH group and 32.0 months in the SMSR group (n = 43, p = 0.39). Two patients in the SCH group and one in the SMSR group converted to open cranial vault reconstruction. Thirty parents agreed to respond to the satisfaction survey (8 SCH, 22 SMSR) based on a Likert scale of responses (0 being most dissatisfied possible, 4 most satisfied possible). Average satisfaction was 3.86/4.0 in the SCH group and 3.45/4.0 in the SMSR group. No parents in the SCH group would change to SMSR, while 3 of the 22 SMSR survey responders would have changed to SCH.

CONCLUSIONS

Perioperative outcomes and average parental satisfaction were similar in both groups. Importance of helmet wear compliance and risk of spring dislodgement should be discussed with parents.

Comparison of Head Shape Outcomes in Metopic Synostosis Using Limited Strip Craniectomy and Open Vault Reconstruction Techniques

AIM

Metopic craniosynostosis (MCS), with its trigonocephalic head shape, is often treated with either limited incision strip craniectomy (LISC) followed by helmet orthotic treatment, or open cranial vault reconstruction techniques (OCVR). There is controversy regarding resultant shape outcomes among craniofacial surgeons. Those adverse to LISC claim normal head shape is never attained, while proponents believe there is gradual correction to an equivalent outcome. This study aims to quantitate, over time, the three-dimensional (3D) head shapes in patients who have undergone LISC or OCVR intervention for MCS.

METHODS

Sixty-three 3D images of 26 patients with MCS were analyzed retrospectively. Head shape analyses were performed at: (1) preoperative, (2) 1-month postoperative, (3) 10 to 14 months postoperative (1 year), and (4) 2 years postoperative. Composite 3D head shapes of patients were compared at each time point. Two-dimensional (2D) standardized cross sections of the forehead were also compared.

RESULTS

Composite head shapes for both groups were nested, to allow visual comparison as the child's forehead grows and expands. The difference between LISC and OCVR 2D cross sections was calculated; 108.26 mm preoperatively, 127.18 mm after 1-month postoperative, 51.05 mm after 10 to 14 months postoperative, and 27.03 mm after 2 years postoperative.

CONCLUSIONS

This study found excellent head shape outcomes for both the LISC and OCVR techniques at 2 years of age. It also corroborates the slow and progressive improvement in head shape with the LISC technique. This study highlights the advantages of 3D photography for measurement of contour outcomes, utilizing both 2D vector and 3D whole head analytical techniques.

Comparison of 2 Sagittal Craniosynostosis Repair Techniques: Spring-Assisted Surgery Versus Endoscope-Assisted Craniectomy With Helmet Molding Therapy

INTRODUCTION

This study compares anthropometric outcomes of 2 sagittal synostosis repair techniques: spring-assisted surgery and endoscope-assisted craniectomy with molding helmet therapy.

METHODS

Patients undergoing spring-assisted surgery (n = 27) or endoscope-assisted craniectomy with helmet therapy (n = 40) at separate institutions were retrospectively reviewed. Pre- and 1-year postoperative computed tomography (CT) or laser scans were analyzed for traditional cranial index (CI), adjusted cranial index (aCI), and cranial vault volume (CVV). Nine patient-matched scans were analyzed for measurement consistency.

RESULTS

The spring-assisted group was older at both time points (P < .050) and spring-assisted group CVV was larger preoperatively and postoperatively (P < .01). However, the change in CVV did not differ between the groups (P = .210). There was no difference in preoperative CI (helmet vs spring: 70.1 vs 71.2, P = .368) between the groups. Postoperatively, helmet group CI (77.0 vs 74.3, P = .008) was greater. The helmet group also demonstrated a greater increase in CI (6.9 vs 3.1, P < .001). The proportion of patients achieving CI of 75 or greater was not significantly different between the groups (helmet vs spring: CI, 65% vs 52%, P = .370). There was no detectable bias in CI between matched CT and laser scans. Differences were identified between scan types in aCI and CVV measurements; subsequent analyses used corrected CVV and aCI measures for laser scan measures.

CONCLUSIONS

Both techniques had equivalent proportions of patients achieving normal CI, comparable effects on cranial volume, and similar operative characteristics. The study suggests that there may be greater improvement in CI in the helmet group. However, further research should be performed.

Spring Cranioplasty: Incorporation Into Practice

OBJECTIVE

The aim of this paper is to discuss ways to incorporate spring-assisted cranioplasty into the surgical armamentarium for craniosynostosis.

BACKGROUND

Spring-assisted cranioplasty after cranial suturectomy for craniosynostosis was popularized in the literature by Dr Lauritzen in 2008 after reporting the results of the first 100 cases. Since that time, more craniofacial surgeons and neurological surgeons have incorporated this surgical technique for treatment of patients presenting with craniosynostosis. This paper will discuss how the team at Nationwide Children's Hospital has incorporated spring-assisted cranioplasty into the care of patients presenting with sagittal synostosis.

METHODS

In this article, the authors review our previous protocol for the treatment of children with sagittal synostosis prior to the introduction of spring cranioplasty. The authors then describe the impetus for incorporating spring-assisted cranioplasty for sagittal synostosis into our practice, and barriers we encountered during this implementation. The authors then discuss their current, comprehensive protocol for treating children with sagittal craniosynostosis. Finally, the authors review the expected and unexpected advantages that our craniofacial program has experienced as they implemented spring-assisted cranioplasty.

CONCLUSION

Incorporation of spring-assisted cranioplasty for sagittal synostosis offers an additional minimally invasive technique, which presents great advantages for many families, and is rewarding for both craniofacial and neurological surgeons.

Identifying the Misshapen Head: Craniosynostosis and Related Disorders

Pediatric care providers, pediatricians, pediatric subspecialty physicians, and other health care providers should be able to recognize children with abnormal head shapes that occur as a result of both synostotic and deformational processes. The purpose of this clinical report is to review the characteristic head shape changes, as well as secondary craniofacial characteristics, that occur in the setting of the various primary craniosynostoses and deformations. As an introduction, the physiology and genetics of skull growth as well as the pathophysiology underlying craniosynostosis are reviewed. This is followed by a description of each type of primary craniosynostosis (metopic, unicoronal, bicoronal, sagittal, lambdoid, and frontosphenoidal) and their resultant head shape changes, with an emphasis on differentiating conditions that require surgical correction from those (bathrocephaly, deformational plagiocephaly/brachycephaly, and neonatal intensive care unit-associated skill deformation, known as NICUcephaly) that do not. The report ends with a brief discussion of microcephaly as it relates to craniosynostosis as well as fontanelle closure. The intent is to improve pediatric care providers' recognition and timely referral for craniosynostosis and their differentiation of synostotic from deformational and other nonoperative head shape changes.

Comparative analysis of cranial vault remodeling versus endoscopic suturectomy in the treatment of unilateral lambdoid craniosynostosis

OBJECTIVE

Unilateral lambdoid synostosis is the premature fusion of a lambdoid suture or sutures and represents the least common form of craniosynostosis, occurring in 1 in 40,000 births. Cranial vault remodeling (CVR) and endoscopic suturectomy with helmet therapy (ES) are surgical approaches that are used to allow for normal brain growth and improved craniofacial symmetry. The authors conducted a comparative outcomes analysis of patients with lambdoid synostosis undergoing either CVR or ES.

METHODS

The authors conducted a retrospective consecutive cohort study of patients with nonsyndromic lambdoid synostosis who underwent surgical correction identified from a single-institution database of patients with craniosynostosis seen between 2000 and 2018. Cranial growth was measured in head circumference percentile and z score.

RESULTS

Nineteen patients (8 female and 11 male) with isolated unilateral lambdoid synostosis were identified (8 right and 11 left). Six underwent CVR and 13 underwent ES. No statistically significant differences were noted between surgical groups with respect to suture laterality, the patient's sex, and length of follow-up. Patients treated with ES presented and underwent surgery at a younger age than those treated with CVR (p = 0.0002 and p = 0.0001, respectively). Operating and anesthesia time, estimated blood loss, and ICU and total hospital days were significantly lower in ES (all p < 0.05). No significant differences were observed in pre- and postoperative head circumference percentiles or z scores between groups up to 36 months postoperatively. No patients required reoperation as of last follow-up.

CONCLUSIONS

Endoscopic management of lambdoid synostosis is safe, efficient, and efficacious in terms of intraoperative and long-term cranial growth outcomes when compared to CVR. The authors recommend this minimally invasive approach as an option for correction of lambdoid synostosis in patients presenting early in their course.

Endoscopic treatment of combined metopic-sagittal craniosynostosis

OBJECTIVE

Combined metopic-sagittal craniosynostosis is traditionally treated with open cranial vault remodeling and fronto-orbital advancement, sometimes in multiple operations. Endoscopic treatment of this multisuture synostosis presents a complex challenge for the surgeon and orthotist.

METHODS

The authors retrospectively analyzed the preoperative and 1-year postoperative CT scans of 3 patients with combined metopic-sagittal synostosis, all of whom were treated with simultaneous endoscope-assisted craniectomy of the metopic and sagittal sutures followed by helmet therapy. Established anthropometric measurements were applied to assess pre- and postoperative morphology, including cranial index and interfrontal divergence angle (IFDA). Patients' measurements were compared to those obtained in 18 normal controls.

RESULTS

Two boys and one girl underwent endoscope-assisted craniectomy at a mean age of 81 days. The mean preoperative cranial index was 0.70 (vs control mean of 0.82, p = 0.009), corrected postoperatively to a mean of 0.82 (vs control mean of 0.80, p = 0.606). The mean preoperative IFDA was 110.4° (vs control mean of 152.6°, p = 0.017), corrected postoperatively to a mean of 139.1° (vs control mean of 140.3°, p = 0.348). The mean blood loss was 100 mL and the mean length of stay was 1.7 days. No patient underwent reoperation. The mean clinical follow-up was 3.4 years.

CONCLUSIONS

Endoscope-assisted craniectomy with helmet therapy is a viable single-stage treatment option for combined metopic-sagittal synostosis, providing correction of the stigmata of trigonoscaphocephaly, with normalization of the cranial index and IFDA.

Long-term 3D CT follow-up after endoscopic sagittal craniosynostosis repair

OBJECTIVE

Surgical treatment of sagittal synostosis involves various surgical modalities. Long-term follow-up issues include increased intracranial pressure, secondary sutural fusion, incomplete reossification, and suboptimal cosmetic appearance. The authors' objective in this study was to review their long-term endoscopic surgical results in children with sagittal synostosis using 3D CT.

METHODS

The authors reviewed the long-term results of their first 38 patients who underwent endoscopic sagittal synostosis repair at age 16 weeks or younger. A standard vertex craniectomy with biparietal wedges was done in each case. After surgery, the children were fitted with a helmet, which they wore until 8 months of age. Patients were followed up for 5 years or longer, at which point a 3D CT scan was obtained. The authors examined data on the cranial index, area of bony defect, presence or absence of secondary sutural fusion, neosuture formation, and scalloping of the inner table of the skull.

RESULTS

Thirty-two of 38 children met inclusion criteria. There was a small but significant recession of the cranial index after the completion of helmeting (from 0.772 after completion of helmeting to 0.755 at 5 years). Of 32 children, 14 had a bony defect area > 4 cm2. Three children had secondary sutural fusion (two unilateral coronal, one bicoronal). Ten of 32 patients had partial neosuture formation.

CONCLUSIONS

The authors report their experience with 32 of their first 38 children who underwent endoscopic sagittal synostosis repair at 16 weeks of age or younger. With a minimum duration of 5 years, this is the longest clinicoradiological follow-up utilizing 3D CT to date in children with sagittal synostosis treated with endoscopic surgery. The authors report detailed measurements of bony loss, adjacent sutural fusion, and neosuture formation.

Minimally Invasive Endoscopic Surgery for Infantile Craniosynostosis: A Longitudinal Cohort Study

OBJECTIVE

To evaluate patient outcomes of minimally invasive endoscopic strip craniectomy (ESC) for craniosynostosis.

STUDY DESIGN

This is a retrospective cohort analysis (2004-2018) of 500 consecutive infants with craniosynostosis treated by ESC with orthotic therapy at a single center. Operative outcomes included transfusions, complications, and reoperations as well as head circumference change based on World Health Organization percentiles. Multivariable logistic regression was used to identify risk factors associated with blood transfusion. Paired t tests were used for within-patient comparisons and Fisher exact test to compare syndromic and nonsyndromic subgroups.

RESULTS

ESC was associated with low rates of blood transfusion (6.6%), complications (1.4%), and reoperations (3.0%). Risk factors for transfusion included syndromic craniosynostosis (P = .01) and multiple fused sutures (P = .02). Median surgical time was 47 minutes, and hospital length of stay 1 day. Transfusion and reoperation rates were higher among syndromic patients (both P < .001). Head circumference normalized by 12 months of age relative to World Health Organization criteria in infants with sagittal, coronal, and multisuture craniosynostosis (all P < .001).

CONCLUSIONS

ESC is a safe, effective, and durable correction of infantile craniosynostosis. ESC can achieve head growth normalization with low risks of blood transfusion, complications, or reoperation. Early identification of craniosynostosis in the newborn period and prompt referral by pediatricians allows families the option of ESC vs larger and riskier open reconstruction procedures.

Perioperative Management and Factors Associated With Transfusion in Cranial Vault Reconstruction

BACKGROUND

Bleeding is the most common adverse event in patients undergoing cranial vault reconstruction. The authors compare the transfusion rates against a national sample to determine whether the patients experience lower transfusion rates.

METHODS

The authors queried the Pediatric National Surgical Quality Improvement Program (Peds-NSQIP) for patients who underwent cranial vault reconstruction (CPT 61559) and compared them to patients who underwent cranial vault reconstruction for sagittal craniosynostosis at Children's Hospital and Medical Center (CHMC) in Omaha, Nebraska. Patients over the age of 24 months were excluded. Binary logistic regression analysis was performed using IBM-SPSS v24.0 to determine factors associated with transfusion at CHMC.

RESULTS

Patient demographics, preoperative hematocrit and platelet counts, readmission rates, and reoperation rates did not differ between CHMC (N = 54) and Peds-NSQIP (N = 1320) cohorts. Patients in the CHMC cohort had shorter preincision anesthesia times (47 versus 80 minutes, P < 0.001), shorter operative times (108 versus 175 minutes, P < 0.001), lower transfusion rates (50% versus 73%, P < 0.001), and smaller mean transfusion volumes (16 versus 33 mL/kg, P < 0.001); however mean length of stay was longer (4.1 versus 3.6 days, P < 0.001). Factors independently associated with transfusion at CHMC included preoperative hematocrit (odds ratio [OR] 0.423, P = 0.002), administration of an antifibrinolytic agent (OR 0.004, P = 0.001) and temperature at the time of incision (OR 0.020, P = 0.043).

CONCLUSION

Patients at CHMC require less transfused blood and experience low transfusion rates. Preoperative hematocrit, administration of antifibrinolytic agents, and temperature at the time of incision are all modifiable factors associated with perioperative transfusion.