Intellectual and academic functioning of school-age children with single-suture craniosynostosis

Cognitive Outcomes of Children With Sagittal Craniosynostosis Treated With Either Endoscopic or Open Calvarial Vault Surgery

Importance

Several studies have reported a higher incidence of neurodevelopmental delays and cognitive deficits in patients with single-suture craniosynostosis; however, there are few studies examining the associations of repair type with cognitive outcomes.

Objective

To measure differences in neuropsychological outcomes between school-age children who were treated for sagittal craniosynostosis and unaffected controls and explore differences in cognitive function among children with sagittal craniosynostosis who were previously treated with either endoscopic strip craniectomy or open calvarial vault surgery.

Design, Setting, and Participants

This cohort study was performed between 2018 and 2022. Eligible participants included patients aged 5 to 17 years who had previously been seen as infants or toddlers (<3 years) at 1 of 3 surgical centers for craniosynostosis repair with either endoscopic surgery or open calvarial vault surgery. A separate cohort of unaffected controls were included for comparison. Data analysis was conducted from November 2023 to February 2024.

Exposures

Open calvarial vault surgery or endoscopic repair for single-suture craniosynostosis.

Main Outcomes and Measures

The primary outcome was the Differential Ability Scales-II (DAS-II) General Conceptual Ability (GCA) score, an index for overall intellectual ability. Secondary outcomes included DAS-II subscale scores (Verbal Ability, Nonverbal Reasoning, Spatial Ability, Working Memory, and Processing Speed), and Patient-Reported Outcomes Measurement Information System (PROMIS) cognitive function scores.

Results

A total of 81 patients with sagittal craniosynostosis (59 male [73%]; 22 female [27%]) and 141 controls (81 male [57%]; 60 female [43%]) were included. Of the 81 participants with sagittal craniosynostosis, 46 underwent endoscopic repair and 35 underwent open repair. Median (range) age at time of follow-up assessment was 7.7 (5.0-14.8) years for children with sagittal craniosynostosis and median age at assessment was 8.5 (7.7-10.5) years for controls. After controlling for age at assessment, sex, and socioeconomic status, there was no statistically significant or clinically meaningful difference in GCA scores between children who underwent endoscopic repair (adjusted mean score, 100; 95% CI, 96-104) and open repair (adjusted mean score, 103; 95% CI, 98-108) (P > .99). We found no significant difference in PROMIS scores between repair types (median [range] for endoscopic repair 54 [31-68] vs median [range] for open repair 50 [32-63]; P = .14). When comparing the treatment groups with the unaffected controls, differences in subscale scores for GCA and working memory were observed but were within normal range.

Conclusions and Relevance

In this cohort study, there were no statistically or clinically significant differences in cognitive outcomes among school-age children by and type of surgical procedure used to repair nonsyndromic sagittal craniosynostosis. These findings suggest primary care clinicians should be educated about different options for craniosynostosis surgery to ensure early referral of these patients so that all treatment options remain viable.

Health-Related Quality of Life in Mexican Children and Adolescents with Non-Syndromic Craniosynostosis

OBJECTIVE

Assess the Health-Related Quality of Life in children and adolescents with non-syndromic craniosynostosis and compare it with participants without craniosynostosis.

DESIGN

Non-experimental, cross-sectional design.

SETTING

The assessment was done remotely and the instrument was sent via chat or email.

PATIENTS/PARTICIPANTS

Participants (ages 8-17) with non-syndromic craniosynostosis (n = 27) and without craniosynostosis (n = 26).

MAIN OUTCOME MEASURE(S)

We used an adapted version for the Mexican population of the Health-Related Quality of Life Questionnaire for Children and Adolescents -KIDSCREEN-52.

RESULTS

All scores were in the average clinical range and both groups scored similarly in all domains except those with craniosynostosis were significantly lower in the Social Support and Peers domain (rpb = 0.48).

CONCLUSIONS

Children and adolescents with non-syndromic craniosynostosis reported similar Health-Related Quality of Life as the control group, except for the Social Support domain, which should be investigated in future studies.

Cognitive Development in Lambdoid Craniosynostosis: A Systematic Review and Meta-Analysis

OBJECTIVE

Lambdoid craniosynostosis affects approximately 1 in 33 000 live births per year, and surgical correction is often sought in order to achieve normocephaly and allow for adequate brain growth. However, the effects of lambdoid synostosis and its treatment on cognitive development are unknown.

DESIGN

Systematic review and meta-analysis.

PATIENTS, PARTICIPANTS

A systematic review of Ovid Medline, Embase, Web of Science, Scopus, Cochrane Central Register of Controlled Trials, and Clinicaltrials.gov was conducted in January 2022. Included studies assessed cognitive development of patients with nonsyndromic unilateral lambdoid craniosynostosis.

MAIN OUTCOME MEASURES

Results of developmental tests were compared to normative data or controls to generate Hedges' g for meta-analysis.

RESULTS

Nine studies met the inclusion criteria. Meta-analysis of 3 studies describing general cognition showed that cases scored significantly lower than their peers, but within 1 standard deviation (g = 0.37, 95% CI [-0.64, -0.10], P = .01). Meta-analysis of verbal and psychomotor development showed no significant differences in children with lambdoid synostosis. Studies were of fair quality and had moderate-to-high heterogeneity.

CONCLUSIONS

Patients with lambdoid craniosynostosis may score slightly below average on tests of general cognition in comparison to normal controls, but results in other domains are variable. Analyses were limited by small sample sizes. Multidisciplinary care and involvement of a child psychologist may be helpful in identifying areas of concern and providing adequate scholastic support. Further research recruiting larger cohorts will be necessary to confirm these findings and extend them to other developmental domains such as attention and executive function.

Prospective Evaluation of Health-Related Quality-of-Life in Children with Craniosynostosis

OBJECTIVE

To investigate health-related quality of life (HRQL) in children aged 2 to 7 years, who have undergone surgery for craniosynostosis.

DESIGN

Cross-sectional survey.

SETTING

A tertiary pediatric academic medical center.

PARTICIPANTS

Children with craniosynostosis who underwent surgical correction, and who were 2-7 years old at the time of the study. Children from families that did not speak English were excluded.

INTERVENTIONS

Caregivers were asked to fill out the Pediatric Quality of Life Inventory (PedsQL) Core Parent Report and the PedsQL Cognitive Functioning Scale.

MAIN OUTCOME MEASURES

PedsQL: Psychosocial Health Summary Score, Physical Health Summary Score, Total Core Score, Cognitive Functioning Scale Score. Scores range from 0 to 100, with higher scores reflecting greater QoLSubject factors: comorbidities, syndromic status, type of craniosynostosis, type of surgery.

RESULTS

The study included 53 subjects, of whom 13.2% had a syndrome. Core and cognitive scores did not depend on presence of a syndrome or suture involved. Subjects who underwent posterior cranial distraction achieved higher Total Core Scores than subjects who underwent open vault remodeling. Among subjects with sagittal craniosynostosis, there was a tendency for higher scores among children who underwent minimally-invasive surgery compared to those who underwent open vault remodeling.

CONCLUSIONS

This study demonstrates similar HRQL among children with and without a syndrome, higher HRQL among children undergoing posterior cranial distraction than those undergoing open vault remodeling, and trends towards higher HRQL in children with sagittal craniosynostosis who underwent minimally-invasive surgery compared to those who underwent open vault remodeling.

Prenatal diagnostic approaches diagnosed craniosynostosis and identified a novel nonsense variant in SMAD6 in a Chinese fetus

Craniosynostosis is one of the most common congenital craniofacial birth defects. The genetic etiology is complex, involving syndromic developmental diseases, chromosomal abnormalities, and monogenic non-syndromic diseases. Herein, we presented a proband of craniosynostosis, who firstly displayed structural abnormalities. This research conducted dynamic ultrasound monitoring a fetus with gradually developing intrauterine growth retardation (IUGR). A novel de novo variant c.41G > A: p.W14* in SMAD6 was identified by pedigree analysis and genetic examination approaches. Recombinant plasmid carrying wild-type sequence and mutant that carries c.41G > A in SMAD6 were constructed and transfected into HEK293T cells. mRNA and protein expression of SMAD6 were reduced in SMAD6 mutants compared to the wild type. Cycloheximide (CHX) treatment and si-UPF1 transfection rescued the SMAD6 mRNA expression in the mutant construct, indicating that c.41G > A: p.W14* in SMAD6 triggered nonsense-mediated mRNA degradation (NMD) process and thus led to haploinsufficiency of the protein product. Our study demonstrated that whole-exome sequencing (WES) was a powerful tool for further diagnosis and etiological identification once fetal malformation was detected by ultrasound. Novel de novo c.41G > A: p.W14* in SMAD6 is pathogenic and potentially leads to craniosynostosis via NMD process.

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.

The Craniofacial Collaboration UK: Developmental Outcomes in 7- and 10-Year-Old Children With Metopic Synostosis

The Craniofacial Collaboration (CC-UK) is a shared initiative across the Psychology teams attached to 4 highly specialized craniofacial centers in the United Kingdom. The CC-UK aims to address key limitations in the existing craniofacial literature by analyzing data for homogenous samples of children with craniosynostosis. This article presents the fifth wave of CC-UK data collection, focused on 7- and 10-year olds who have undergone primary corrective surgery for metopic synostosis (MS). Data for children with sagittal synostosis and MS have previously been presented at 3 and 5 years. This paper continues to build on this with consideration to older age groups, presenting the first CC-UK analysis of cognitive assessment data using the Wechsler Abbreviated Scale of Intelligence-Second Edition. Results show that the majority of children with MS fall within the average ranges across behavioral and neurodevelopmental domains. However, several domains indicated a trend of heightened concern when compared with normative data, particularly for parent-reported outcomes, suggesting that there may be some subtle difficulties for children with MS. Consideration of how these findings compare with that of previous CC-UK analyses is explored. Further, implications for clinical practice and future research are considered, with the need for longitudinal analyses, as well as data from multiple perspectives (eg, school, parents, and self) at older age points to establish patterns over time. Through collaboration across the highly specialized craniofacial centers, the CC-UK hopes to work toward this goal moving forward.

Skull progenitor cell-driven meningeal lymphatic restoration improves neurocognitive functions in craniosynostosis

The meninges lie in the interface between the skull and brain, harboring lymphatic vasculature and skull progenitor cells (SPCs). How the skull and brain communicate remains largely unknown. We found that impaired meningeal lymphatics and brain perfusion drive neurocognitive defects in Twist1+/- mice, an animal model of craniosynostosis recapitulating human Saethre-Chotzen syndrome. Loss of SPCs leads to skull deformities and elevated intracranial pressure (ICP), whereas transplanting SPCs back into mutant mice mitigates lymphatic and brain defects through two mechanisms: (1) decreasing elevated ICP by skull correction and (2) promoting the growth and migration of lymphatic endothelial cells (LECs) via SPC-secreted vascular endothelial growth factor-C (VEGF-C). Treating Twist1+/- mice with VEGF-C promotes meningeal lymphatic growth and rescues defects in ICP, brain perfusion, and neurocognitive functions. Thus, the skull functionally integrates with the brain via meningeal lymphatics, which is impaired in craniosynostosis and can be restored by SPC-driven lymphatic activation via VEGF-C.

"Morphologic Severity and Age at Surgery Are Associated with School Age Neurocognitive Outcomes in Metopic Craniosynostosis"

BACKGROUND

Radiographic severity of metopic synostosis has been suggested as a predictor of long-term neurocognitive outcomes, and artificial intelligence (AI) has recently been used to quantify severity. Age at surgery is predictive of long-term neurocognition in sagittal synostosis but has not been adequately explored in metopic synostosis.

METHODS

Children ages 6 to 18 years old with corrected metopic synostosis underwent testing of intelligence quotient (IQ), academic achievement, and visuomotor integration (VMI). Various manual measurements and AI-derived severity scores were determined. Scans were categorized as moderate or severe for head-to-head comparisons and multivariable linear regressions were used to assess the relationship of age at surgery and severity with neurocognitive outcomes.

RESULTS

41 patients with average age at testing of 10.8 ± 3.4 years were included. 18 patients were in the severe group while 23 patients were in the moderate group with average ages at surgery 6.6 ± 2.7 and 10.6 ± 8.4 months, respectively (p = 0.062). Greater AI-derived severity was significantly associated with lower reading comprehension (p = 0.040 and 0.018) and reading composite scores (p = 0.024 and p = 0.008). Older age at surgery was significantly associated with lower VMI scores (p-values ranging from 0.017 to 0.045) and reading composite scores (p = 0.047 and 0.019).

CONCLUSIONS

This study suggests an association between greater AI-derived radiographic severity and lower reading ability in corrected metopic synostosis. Older age at surgery was independently associated with lower reading ability and visuomotor integration. Surgical correction may mitigate neurodevelopmental differences based on severity that have been observed pre-operatively.

Academic Achievement in School-Aged Children with Single Suture Craniosynostosis Over Time

Introduction: Children with single suture craniosynostosis (SSC) are at risk for neurocognitive problems. The reported magnitude of differences between children with SSC and their normative peers on standardized tests of academic and intellectual ability are small. Evaluation of real-world academic outcomes of these children and its impact on educational resources have not been conducted. Methods: A retrospective cohort study of academic outcomes of children with SSC was conducted using the data from Ontario's Education Quality and Accountability Office (EQAO) standardized provincial reading, writing and mathematics tests. The need for special education was identified by documentation of the child's need for an Identification, Placement, and Review Committee (IPRC). Results: Of 296 eligible children, 42 participated in the study. Half of the children had sagittal synostosis, while the remaining were 10 (24%) unicoronal, 9 (21%) metopic, and 2 (5%) lambdoid synostosis. Thirty-six (86%) underwent operative management. The EQAO scores of operated children with SSC met the provincial academic standards on the Grade 3 and 6 EQAO scores across the 3 academic subjects. Converted grade-matched EQAO scores decreased in reading and writing over time, while math improved. Of the 21 patients with special education data, one child required an IPRC in Grade 3, while an additional four (24%) required an IPRC in Grade 6. Conclusions: Operated children with SSC had average academic performance, however, their needs appeared to change over time. Future studies are needed to evaluate academic difficulties and special education needs as these children progress through grade school.

Long-term neurocognitive outcomes in 204 single-suture craniosynostosis patients

PURPOSE

Craniosynostosis, which describes premature fusion of one or more cranial sutures, has been associated with a variety of neurocognitive deficits. We sought to explore the cognitive profiles of the various types of single-suture, non-syndromic craniosynostosis (NSC).

METHODS

A retrospective review of children 6-18 years old with surgically corrected NSC who underwent neurocognitive testing (Weschler Abbreviated Scale of Intelligence, Beery-Buktenica Developmental Test of Visuomotor Integration) from the years 2014-2022 was conducted.

RESULTS

204 patients completed neurocognitive testing (139 sagittal, 39 metopic, 22 unicoronal, 4 lambdoid suture). 110 (54%) of the cohort was male, and 150 (74%) were White. Mean IQ was 106.10±14.01 and mean age at surgery and testing were 9.0±12.2 months and 10.9±4.0 years, respectively. Sagittal synostosis was associated with higher scores than metopic synostosis, with significant differences in verbal IQ (109.42±15.76 vs 101.37±10.41), full-scale IQ (108.32±14.44 vs 100.05±11.76), visuomotor integration (101.62±13.64 vs 92.44±12.07), visual perception (103.81±12.42 vs 95.87±11.23), and motor coordination (90.45±15.60 vs 84.21±15.44). Sagittal synostosis was associated with significantly higher scores for visuomotor integration (101.62±13.64 vs 94.95±10.24) and visual perception (103.81±12.42 vs 94.82±12.75) than unicoronal synostosis.

CONCLUSIONS

Compared to patients with sagittal synostosis, patients with metopic synostosis exhibited lower scores in verbal IQ, full-scale IQ, visuomotor integration, visual perception, and motor control after surgical correction. Despite surgical correction for premature metopic suture fusion, the effect on the adjacent frontal lobe and white matter connections to other regions of the brain may have a lasting functional impact. Patients with unicoronal synostosis exhibited lower visuomotor integration and visual perception scores.

Bone-targeted bortezomib increases bone formation within Calvarial trans-sutural distraction osteogenesis

The high rate of relapse in craniofacial disharmony treatment via trans-sutural distraction osteogenesis (TSDO) is due to the failure to form a stable bone bridge in the suture gap. Bisphosphonates (BP) have a high propensity to localize to hydroxyapatite in the bone matrix and are commonly used as targeting ligands for local delivery of therapeutics into bone microenvironment. Bone-targeted Bortezomib (BP-Btz) is chemosynthetic by linking Btz (Bortezomib) to a BP residue and could target bone tissue to promote osteoblast differentiation and inhibit osteoclastogenesis. Here, suture-derived mesenchymal stem cells (SuSCs) and osteoclasts were treated with Btz and BP-Btz. Aforesaid drugs were injected locally into the sagittal sutures to explore their effects in TSDO. Further, pharmacological properties of BP-Btz in the suture expansion model were assessed by fluorescent BP analogs and levels of total ubiquitinated (Ub)-proteins. The results showed that BP-Btz could stimulate osteogenic differentiation of SuSCs, bind to bone matrix and inhibit osteoclastogenesis. Biological effects of BP-Btz were similar with those of Btz in osteoblast differentiation and osteoclastogenesis inhibition in vitro. Activated bone metabolism were detected after 14 days in the sagittal suture expansion model. Increased osteoid area, remarkably decreased osteoclast surface and enhanced osteogenesis were detected in vivo after treatment with BP-Btz. Green fluorescence signal detection and pharmacodynamic studies revealed that BP-Btz bound to suture edge, released Btz in remodeling conditions, had a higher local concentration and sustained longer than free Btz. This study delineated the clinical potential of bone-targeted Btz conjugate as an efficacious strategy to promote trans-sutural distraction osteogenesis.

Cognitive performance in preschoolers with non-syndromic craniosynostosis undergoing surgery: A comparison with typically developing children

This study aimed to determine the cognitive profile of preschool children undergoing surgery to correct non-syndromic craniosynostosis, compare them with typically developing children, and analyze possible cognitive deficits in the most prevalent subtypes: sagittal and unicoronal. Thirty-one children aged 3 years to 5 years and 11 months with non-syndromic craniosynostosis (11 sagittal, 9 unicoronal, 4 metopic, 3 lambdoid, 4 multisutural) who underwent surgery were compared with thirty-one typically developing children. The Wechsler Preschool and Primary Scale of Intelligence-Third Edition (WPPSI-III) was used to assess cognitive function. Children with non-syndromic craniosynostosis scored below the typically developing children in the Verbal Intelligence Quotient (VIQ) and Full-Scale Intelligence Quotient (FISQ). When specific subtypes were compared, children with sagittal synostosis scored similarly to the typically developing children; in contrast, children with unicoronal synostosis had lower performance in the Processing Speed Quotient and FISQ. The proportion of participants scoring below one standard deviation on the VIQ, General Language Composite, and FISQ was greater in the non-syndromic craniosynostosis group. This study supports the finding that children with non-syndromic craniosynostosis, particularly those with unicoronal synostosis, have more cognitive difficulties than those with normal development. Assessing cognition at preschool age in children with non-syndromic craniosynostosis is important in order to detect difficulties before they become more apparent at school age.

Health-related quality of life of children treated for non-syndromic craniosynostosis

Health-related quality of life (HRQoL) allows the acquisition of the subjective perspective of patients regarding their health and function; yet a very few studies have been evaluated HRQoL of patients treated for craniosynostosis (CS). In this retrospective, descriptive cohort study, school-aged children (7-16 years) treated for non-syndromic CS were assessed using the Pediatric Quality of Life Inventory (PedsQL) 4.0 Generic Core Scales. Seventy-three patients and their parents responded to the PedsQL (response rate: 80.2%). Patients generally estimated average HRQoL with no difference compared to the normal population sample. Further, no difference in HRQoL was found between treated sagittal (SS) or metopic synostosis. In the SS group, surgical methods involving spring-assisted surgery and pi-plasty were unrelated to HRQoL outcomes. Additionally, HRQoL was highly correlated with intelligence quotient (IQ, r = 0.42; p = 0.0004) and adaptive behavior skills (ABAS, r = 0.57; p = 0.0001). Furthermore, differences were observed in estimated physical function (p = 0.002) and school function (p = 0.012) between self- and proxy reports (i.e. parents estimated child HRQoL as higher than did the children). Children treated for CS have a generally average HRQoL, and neither CS type nor surgical method influenced HRQoL outcomes. Moreover, children and parents estimated HRQoL differently, suggesting the importance of using both self- and proxy reporting in patient-reported measures. HRQoL was strongly related to IQ and ABAS, indicating that the PedsQL can be used as a screening instrument to identify craniofacial patients in need of further psychological assessment.

Neurodevelopment in unilateral coronal craniosynostosis: a systematic review and meta-analysis

OBJECTIVE

The current literature on unilateral coronal craniosynostosis is replete with repair techniques and surgical outcomes; however, information regarding neurodevelopment remains unclear. Therefore, the aim of this systematic review and meta-analysis was to comprehensively assess the neurodevelopmental outcomes of patients with unicoronal craniosynostosis compared with their healthy peers or normative data.

METHODS

A systematic review of the Ovid MEDLINE, Embase, Web of Science, Scopus, Cochrane Library, and ClinicalTrials.gov databases from database inception to January 19, 2022, was performed. Included studies assessed neurodevelopment of patients with unicoronal craniosynostosis. Two independent reviewers selected studies and extracted data based on a priori inclusion and exclusion criteria. Results of developmental tests were compared with normative data or controls to generate Hedges' g statistics for meta-analysis. The quality of included studies was evaluated using the National Institutes of Health Assessment Tool.

RESULTS

A total of 19 studies were included and analyzed, with an overall fair reporting quality. A meta-analysis of 325 postoperative patients demonstrated that scores of general neurodevelopment were below average but within one standard deviation of the norm (Hedges' g = -0.68 [95% CI -0.90 to -0.45], p < 0.001). Similarly, postoperative patients exhibited lower scores in verbal, psychomotor, and mathematic outcome assessments.

CONCLUSIONS

This systematic review and meta-analysis found that patients with unicoronal craniosynostosis had poorer neurodevelopment, although scores generally remained within the normal range. These data may guide implementation of regular neurocognitive assessments and early learning support of patients with unicoronal craniosynostosis.

Longitudinal Outpatient and School-Based Service Use among Children with Nonsyndromic Craniosynostosis

BACKGROUND

Although nonsyndromic craniosynostosis has been associated with neurodevelopmental sequelae, a lesser amount of emphasis has been placed on the need for related supportive services. This study assessed the prevalence of such services among children surgically treated for nonsyndromic craniosynostosis and identified predictors of service use.

METHODS

Parents of children with nonsyndromic craniosynostosis were recruited from an online craniosynostosis support network and surveyed regarding their child's use of various outpatient and school-based services. Multiple stepwise regression was performed to identify predictive variables for each type of intervention.

RESULTS

A total of 100 surveys were completed. Of these, 45 percent of parents reported use of one or more outpatient support services for their children. The most commonly used services were speech therapy (26.0 percent) and physical therapy (22.0 percent), although the use of services such as psychology/psychiatry increased among older children (18.2 percent in children aged 6 to 10 years). Among school-age children ( n = 49), the majority of parents (65.3 percent) reported school-based assistance for their children, most commonly for academic (46.9 percent) or behavioral (42.9 percent) difficulties. Significant predictive variables ( p < 0.05 following stepwise regression) for increases in various outpatient and school-based services included male sex, African American race/ethnicity, higher parental income, the presence of siblings in the household, increased age at the time of surgery, and sagittal synostosis.

CONCLUSIONS

Parents of children with nonsyndromic craniosynostosis reported frequent use of outpatient and school-based supportive services throughout childhood. These services may incur a significant burden of care on families. The multifactorial nature of predictive models highlights the importance of cross-disciplinary collaboration to address each child's longitudinal needs.

Sickle Cell Disease Association with Premature Suture Fusion in Young Children

Sickle cell disease (SCD) leads to the formation of an atypical hemoglobin tetramer with reduced capacity to carry oxygen. Although correlation between SCD and craniosynostosis (CS) has been mentioned, these are mostly small series or case reports. This article aimed to study any correlation between these entities in a large pediatric population.

Methods

We retrospectively reviewed head CT scans of SCD patients from 0 to 8 years of age who required a CT for issues unrelated to their head shape between 2012 and 2020. We excluded patients with known history of CS or any CS-related syndrome, hydrocephalus, shunt placement, history of cranial surgery, or any reported cerebral or cranial shape abnormality.

Results

Ninety-four CT scans were analyzed. The mean age at imaging was 4.48 ± 2.30 years. CS prevalence in this cohort was 19.1%. Analysis between independent variables and patients with +CS showed that SCD-associated vasculopathy, first-degree relatives with SCD, and the use of folic acid had a statistically significant association with CS development.

Conclusions

Approximately 20% of pediatric patients with SCD developed CS. This association was higher in those patients who had a family history of SCD, used folic acid, and had SCD-associated vasculopathy. While the clinical impact of these findings needs more extensive study, centers that manage patients with SCD should be aware of the relatively high concordance of these diagnoses, vigilantly monitor head shape and growth parameters, and understand the potential risks associated with unidentified or untreated CS.

Fronto-Orbital Advancement for Metopic and Unilateral Coronal Craniosynostoses

Fronto-orbital advancement remains a powerful technique for the correction of anterior cranial vault differences related to metopic (trigonocephaly) or unilateral coronal (anterior plagiocephaly) craniosynostoses. Traditional fronto-orbital advancement requires access to the forehead and superior 2/3 of the orbit via a coronal incision. The frontal bone and orbital segment (bandeau) are then separated from the skull and reshaped. In patients with metopic craniosynostosis, the bandeau and frontal bone will need to be advanced and widened. In patients with unilateral coronal craniosynostosis, the bandeau will need to be "untwisted" to address the supraorbital retrusion on the affected side, the affected orbit will need to be shortened and widened, and the frontal bone flap will need to be proportionately advanced on the affected side. Overcorrection of the affected dimension should be undertaken to account for growth and relapse.

Assessing Long-Term Neurodevelopment among Children with Non-Syndromic Single Suture Craniosynostosis

Background:

Single suture craniosynostosis (SSC) is a disorder, affecting brain growth. Reviewing literature reveals controversialists of papers in this field.

Methods:

This prospective study was conducted from 2014 to 2016. All the individuals, aged 2 to 16 years, whose medical records files were complete, with SSC from 1999 to 2013 were included. All patients had undergone cranial vault remodeling at Mofid Hospital, Tehran, Iran. Wechsler questionnaires, WPPSI-III and WISC-IV, were completed for each child based on his/her age.

Results:

Seventy children were included, with the mean age of 6.7 (±2.9) years. Forty-six (65.7%) children were boys while 24 (34.3%) were girls. Mean FSIQ for all of children was 95.5 (±13.2). Mean verbal IQ, performance IQ, verbal comprehension, perceptual reasoning, processing speed, and working memory are 93.4 (±14.1), 96.1 (±13.3), 97.5 (±13.9), 102.2 (±12.5), 94.5 (±9.8), and 97.5 (±12.9), respectively. There was statistically significant difference between FSIQ of children with SSC and that of unaffected children (P-value<0.05). There was significant difference between verbal IQ of children with SSC and that of unaffected ones (P-value< 0.007). There was significant difference between in processing speed between affected children and unaffected children (P-value<0.012).

Conclusion:

Children, aged 2 to 6 years, with SSC had a significantly lower Verbal IQ, and children, aged 6 to 16 years, with SSC had a significantly lower processing speed than their healthy counterparts. Though FSIQ of children with SSC falls within normal range, it is a little lower than healthy peers.

Epidemiology, Genetics, and Pathophysiology of Craniosynostosis

Craniosynostosis, the premature fusion of the infant cranial skulls, can be recognized by characteristic head shape differences that worsen with head growth. Craniosynostosis can be syndromic or nonsyndromic and can involve one suture or multiple sutures. Timely cranial vault surgery is recommended to expand and reshape the skull, with a goal of preventing increased intracranial pressure and providing sufficient space for brain growth. Several gene variants and environmental exposures are known to increase the risk of single suture craniosynostosis (SSC), including in utero constraint, exposure to specific toxins and medications, and medical conditions such as thyroid dysregulation and metabolic bone disorders.

Update in Management of Craniosynostosis

LEARNING OBJECTIVES

After studying this article, the participant should be able to: 1. Understand the craniofacial dysmorphology of craniosynostosis, and the variation of each type. 2. Identify the functional concerns and learn the rationale behind timing of operative intervention. 3. Approach each dysmorphology critically and identify the operative intervention needed to improve form and function 4. Understand and address the specific issues related to syndromic craniosynostosis and be able to delineate management plan.

SUMMARY

Craniosynostosis is a condition in which premature fusion of one or more cranial sutures lead to abnormal head shape and growth restriction of the brain. Nonsyndromic craniosynostosis occurs in isolation, and usually involves a single suture, whereas syndromic craniosynostosis may involve multiple sutures and is associated with extracraniofacial findings. Although surgical management can be similar, the treatment plan must take into consideration issues specific to the syndromes. This article aims to provide a concise overview of the authors' current understanding regarding the presentation, treatment principle, surgical option, and debates in craniosynostosis.

A Diffusion Tensor Imaging Analysis of Frontal Lobe White Matter Microstructure in Trigonocephaly Patients

BACKGROUND

Children with trigonocephaly are at risk for neurodevelopmental disorders. The aim of this study is to investigate white matter properties of the frontal lobes in young, unoperated patients with metopic synostosis as compared to healthy controls using diffusion tension imaging (DTI).

METHODS

Preoperative DTI data sets of 46 patients with trigonocephaly with a median age of 0.49 (interquartile range: 0.38) years were compared with 21 controls with a median age of 1.44 (0.98) years. White matter metrics of the tracts in the frontal lobe were calculated using FMRIB Software Library (FSL). The mean value of tract-specific fractional anisotropy (FA) and mean diffusivity (MD) were estimated for each subject and compared to healthy controls. By linear regression, FA and MD values per tract were assessed by trigonocephaly, sex, and age.

RESULTS

The mean FA and MD values in the frontal lobe tracts of untreated trigonocephaly patients, younger than 3 years, were not significantly different in comparison to controls, where age showed to be a significant associated factor.

CONCLUSIONS

Microstructural parameters of white matter tracts of the frontal lobe of patients with trigonocephaly are comparable to those of controls aged 0-3 years.

Genetic Influence on Neurodevelopment in Nonsyndromic Craniosynostosis

BACKGROUND

Nonsyndromic craniosynostosis is one of the most common anomalies treated by craniofacial surgeons. Despite optimal surgical management, nearly half of affected children have subtle neurocognitive deficits. Whereas timing and type of surgical intervention have been studied, the possibility of genetic influence on neurodevelopment in nonsyndromic craniosynostosis patients remains unexplored.

METHODS

The authors performed whole-exome sequencing for 404 case-parent trios with sporadic nonsyndromic craniosynostosis. Statistical analyses were performed to assess the burden of de novo mutations in cases compared to both expectation and 1789 healthy control trios. Individuals with and without each mutation class were analyzed, and the presence or absence of various types of neurodevelopmental delay were recorded alongside demographic information.

RESULTS

The authors identified a highly significant burden of damaging de novo mutations in mutation-intolerant [probability of loss of function intolerance (pLI) >0.9] genes in nonsyndromic craniosynostosis probands (p = 5.9 × 10-6). Children with these mutations had a two-fold higher incidence of neurodevelopmental delay (p = 0.001) and a more than 20-fold greater incidence of intellectual disability (p = 7.2 × 10-7), and were 3.6-fold more likely to have delays that persisted past 5 years of age (p = 4.4 × 10-4) in comparison with children with nonsyndromic craniosynostosis without these mutations. Transmitted loss of function mutations in high-pLI genes also conferred a 1.9-fold greater risk of neurodevelopmental delay (p = 4.5 ×10-4).

CONCLUSIONS

These findings implicate genetic lesions concurrently impacting neurodevelopment and cranial morphogenesis in the pathoetiology of nonsyndromic craniosynostosis and identify a strong genetic influence on neurodevelopmental outcomes in affected children. These findings may eventually prove useful in determining which children with nonsyndromic craniosynostosis are most likely to benefit from surgical intervention.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Risk, III.

The clinical manifestations, molecular mechanisms and treatment of craniosynostosis

Craniosynostosis is a major congenital craniofacial disorder characterized by the premature fusion of cranial suture(s). Patients with severe craniosynostosis often have impairments in hearing, vision, intracranial pressure and/or neurocognitive functions. Craniosynostosis can result from mutations, chromosomal abnormalities or adverse environmental effects, and can occur in isolation or in association with numerous syndromes. To date, surgical correction remains the primary treatment for craniosynostosis, but it is associated with complications and with the potential for re-synostosis. There is, therefore, a strong unmet need for new therapies. Here, we provide a comprehensive review of our current understanding of craniosynostosis, including typical craniosynostosis types, their clinical manifestations, cranial suture development, and genetic and environmental causes. Based on studies from animal models, we present a framework for understanding the pathogenesis of craniosynostosis, with an emphasis on the loss of postnatal suture mesenchymal stem cells as an emerging disease-driving mechanism. We evaluate emerging treatment options and highlight the potential of mesenchymal stem cell-based suture regeneration as a therapeutic approach for craniosynostosis.

School-age outcomes in patients with unilateral coronal synostosis: comparison of fronto-orbital advancement and endoscopic strip craniectomy

OBJECTIVE

Outcomes research on unilateral coronal synostosis is mostly limited to the early postoperative period. This study examines facial asymmetry, desire for revision, and patient-reported outcomes at school age in children who received either endoscopic strip craniectomy with helmet therapy or fronto-orbital advancement (open repair).

METHODS

Patients with repaired unilateral coronal synostosis born between 2000 and 2017, with 3D photographs taken when they were between 3.5 and 8 years of age, were eligible for study inclusion. Three pairs of bilateral linear measurements and two angular measurements were taken. Parent- and physician-reported desire for revision and patient-reported outcomes (Patient-Reported Outcomes Measurement Information System cognitive function and Quality of Life in Neurological Disorders stigma scores) were collected from patient charts.

RESULTS

Thirty-five patients qualified, including 25 with open repair and 10 with endoscopic repair. The median patient ages at repair were 3 months and 8 months in the endoscopic and open groups, respectively. The average ages at final 3D photography were 5.8 years and 5.5 years in the endoscopic and open groups, respectively. Digital anthropometry revealed no significant differences in measures of facial asymmetry between the repair groups (p ≥ 0.211). Midface depth (tragion to subnasale) was significantly less symmetric at school age than other linear measures (F(2,102) = 9.14, p < 0.001). Forehead asymmetry was significantly associated with parent- and physician-reported desire for revision (p ≤ 0.006). No significant associations were found between physical asymmetry and patient-reported stigma or cognitive function (p > 0.046, Holm-Bonferroni correction).

CONCLUSIONS

Children who underwent open or endoscopic repair for unilateral coronal synostosis have comparable facial symmetry at school age, but midface depth remains highly asymmetrical in both groups. Forehead asymmetry at school age correlates with parent- and physician-reported desire for revision.

Using Patient-Reported Outcome Measures to Screen for Cognitive Function Deficits and Stigma in Patients with Single-Suture Craniosynostosis

SUMMARY

Children with single-suture craniosynostosis have small but significant deficits in appearance ratings and neurodevelopment. Traditionally, these parameters are studied using a full battery of examinations, which are very time consuming. This study evaluated a convenient method to measure psychosocial parameters in this population by utilizing patient-reported outcomes measures to evaluate cognitive function and stigma. Stigma and cognitive function were measured, using the Patient-Reported Outcomes Measurement Information System and Quality of Life in Neurological Disorders questionnaires, in 59 consecutive patients at least 5 years old presenting to clinic from July of 2018 to January of 2020 with repaired single-suture craniosynostosis. Parents completed parent proxy cognitive function surveys for patients under age 8. Questionnaires were administered electronically as part of clinical care. Scores were automatically transferred to the electronic medical record and correlated with previously acquired Child Behavior Checklist results. Median time to complete the questionnaires was 57 and 49 seconds, respectively. Stigma and cognitive function were significantly correlated with the associated Child Behavior Checklist subscores (Spearman's rho, -0.384, p = 0.023; and Spearman's rho, -0.683, p = 0.001, respectively). The Patient-Reported Outcomes Measurement Information System and Quality of Life in Neurological Disorders questionnaires offer a convenient method of screening psychosocial parameters in children with single-suture craniosynostosis that otherwise would be difficult to obtain during standard visits. Short completion times and electronic scoring increase clinical utility.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Diagnostic, II.

The genetic overlap between osteoporosis and craniosynostosis

Osteoporosis is the most prevalent bone condition in the ageing population. This systemic disease is characterized by microarchitectural deterioration of bone, leading to increased fracture risk. In the past 15 years, genome-wide association studies (GWAS), have pinpointed hundreds of loci associated with bone mineral density (BMD), helping elucidate the underlying molecular mechanisms and genetic architecture of fracture risk. However, the challenge remains in pinpointing causative genes driving GWAS signals as a pivotal step to drawing the translational therapeutic roadmap. Recently, a skull BMD-GWAS uncovered an intriguing intersection with craniosynostosis, a congenital anomaly due to premature suture fusion in the skull. Here, we recapitulate the genetic contribution to both osteoporosis and craniosynostosis, describing the biological underpinnings of this overlap and using zebrafish models to leverage the functional investigation of genes associated with skull development and systemic skeletal homeostasis.

Management of Lambdoid Craniosynostosis: A Comprehensive and Systematic Review

BACKGROUND

Craniosynostosis is a condition characterized by the premature fusion of 2 or more skull bones. Craniosynostosis of the lambdoid suture is one of the rarest forms, accounting for 1-4% of all craniosynostoses. Documented cases are separated into simple (single suture), complex (bilateral), and associated with adjacent synostoses ("Mercedes Benz" Pattern) or syndromes (i.e., Crouzon, Sathre-Chotzen, Antley-Bixler). This condition can manifest phenotypic deformities and neurological sequelae that can lead to impaired cognitive function if improperly treated or left undiagnosed. Preferred surgical techniques have varied over time but all maintain the common goals of establishing proper head shape and preventing of complications that could contribute to aforementioned sequelae.

SUMMARY

This comprehensive review highlights demographic distributions, embryological development, pathogenesis, clinical presentation, neurological sequelae, radiologic findings, surgical techniques, surgical outcomes, and postoperative considerations of patients with lambdoid craniosynostosis presentation. In addition, a systematic review was conducted to explore the operative management of lambdoid craniosynostosis using PubMed, Embase, and Scopus databases, with 38 articles included after screening. Key Messages: Due to a low volume of published cases, diagnosis and treatment can vary. Large overlap in presentation can occur in patients that display lambdoid craniosynostosis and posterior plagiocephaly, furthering the need for comprehensive analysis. Possessing the knowledge and tools to properly assess patients with lambdoid craniosynostosis will allow for more precise care and improved outcomes.

Academic achievement and needs of school-aged children born with selected congenital anomalies: A systematic review and meta-analysis

Children with congenital anomalies have poorer intellectual and cognitive development compared to their peers, but evidence for academic achievement using objective measures is lacking. We aimed to summarize and synthesize evidence on academic outcomes and special education needs (SEN) of school‐aged children born with selected major structural congenital anomalies. Electronic databases (MEDLINE, EMBASE, Scopus, PsycINFO, CINAHL, ProQuest Natural Science and Education Collections), reference lists and citations for 1990–2020 were systematically searched. We included original‐research articles on academic achievement in children with non‐syndromic congenital anomalies that involved school test results, standardized tests and/or SEN data. Random‐effects meta‐analyses were performed to estimate pooled mean test scores in mathematics and/or reading where possible and pooled odds ratios (ORs) for SEN in children with severe congenital heart defects (CHDs) and children with orofacial clefts (OFCs). Thirty‐nine eligible studies (n = 21,066 children) were synthesized narratively. Sixteen studies were included in meta‐analyses. Children with non‐syndromic congenital anomalies were at a higher risk of academic underachievement than controls across school levels. Children with severe CHD (pooled OR = 2.32, 95% CI: 1.90, 2.82), and children with OFC (OR = 1.38 (95% CI: 1.20, 1.57), OR = 3.07 (95% CI: 2.65, 3.56), and OR = 3.96 (95% CI: 3.31, 4.72) for children with cleft lip, cleft palate and cleft lip/palate, respectively) had significantly higher ORs for SEN than controls. Children with non‐syndromic congenital anomalies underperform academically and have higher SEN rates compared to their peers. Early monitoring and development of differential SEN are important to promote academic progress in these children.

Sagittal Synostosis and Its Association With Cognitive, Behavioral, and Psychological Functioning: A Meta-analysis

IMPORTANCE

Findings on the cognitive, behavioral, and psychological functioning of individuals with sagittal synostosis (SS) are highly disparate, limiting their clinical utility.

OBJECTIVE

To identify and review research on individuals with SS and to determine whether, and to what extent, they experience cognitive, behavioral, and psychological difficulties compared with their healthy peers or normative data for each measure.

DATA SOURCES

PubMed, Scopus, Embase, and PsycINFO were searched through January 2021 with no date restrictions. Scopus citation searches and manual checks of the reference lists of included studies were conducted.

STUDY SELECTION

Studies included participants of any age who had received a diagnosis of single-suture (isolated or nonsyndromic) SS or scaphocephaly and who had been assessed on cognitive, behavioral, and psychological outcomes.

DATA EXTRACTION AND SYNTHESIS

Data were independently extracted by 2 reviewers. Case-control outcomes (individuals with SS vs healthy peers or normative data) were compared using random-effects models with 3 effect sizes calculated: weighted Hedges g (gw), odds ratios (ORs), and mean prevalence rates. This study follows the Meta-analysis of Observational Studies in Epidemiology (MOOSE) reporting guidelines.

MAIN OUTCOMES AND MEASURES

Findings were categorized by surgical status (conservatively managed, presurgery, postsurgery, or combined); domain (eg, general cognition); type of cognitive, behavioral, or psychological measure (objective or subjective); and source of comparison data (peers or normative data).

RESULTS

Data from 32 studies, involving a pooled sample of 1422 children and adults with SS (mean [SD] age at assessment, 5.7 [6.6] years; median [interquartile range] age, 3.3 [0.5-10.3] years), were analyzed. Data on sex were available for 824 participants, and 642 (78%) were male. Individual study results varied substantially. Objective tests identified significant moderate group differences on 3 of 16 examined domains: presurgical motor functioning (3 studies; gw = -0.42; 95% CI, -0.67 to -0.18; P < .001), postsurgical short-term memory (2 studies; gw = -0.45; 95% CI, -0.72 to -0.17; P < .001), and postsurgical visuospatial ability (6 studies; gw = 0.31; 95% CI, 0.18 to 0.44; P < .001). Prevalence estimates and ORs varied widely, with 15 studies showing prevalence estimates ranging from 3% to 37%, and 3 studies showing ORs ranging from 0.31 (95% CI, 0.01 to 6.12) for processing speed in the conservatively managed sample to 4.55 (95% CI, 0.21 to 98.63) for postsurgical visuospatial abilities.

CONCLUSIONS AND RELEVANCE

In this meta-analysis, findings for the functioning of participants with SS were highly disparate and often of low quality, with small samples sizes and control groups rarely recruited. Nonetheless, the findings suggest that some individuals with SS experience negative outcomes, necessitating routine assessment.

Cranial Suture Mesenchymal Stem Cells: Insights and Advances

The cranial bones constitute the protective structures of the skull, which surround and protect the brain. Due to the limited repair capacity, the reconstruction and regeneration of skull defects are considered as an unmet clinical need and challenge. Previously, it has been proposed that the periosteum and dura mater provide reparative progenitors for cranial bones homeostasis and injury repair. In addition, it has also been speculated that the cranial mesenchymal stem cells reside in the perivascular niche of the diploe, namely, the soft spongy cancellous bone between the interior and exterior layers of cortical bone of the skull, which resembles the skeletal stem cells’ distribution pattern of the long bone within the bone marrow. Not until recent years have several studies unraveled and validated that the major mesenchymal stem cell population of the cranial region is primarily located within the suture mesenchyme of the skull, and hence, they are termed suture mesenchymal stem cells (SuSCs). Here, we summarized the characteristics of SuSCs, this newly discovered stem cell population of cranial bones, including the temporospatial distribution pattern, self-renewal, and multipotent properties, contribution to injury repair, as well as the signaling pathways and molecular mechanisms associated with the regulation of SuSCs.

Children Treated for Nonsyndromic Craniosynostosis Exhibit Average Adaptive Behavior Skills with Only Minor Shortcomings

BACKGROUND

Adaptive behavior skills are important when assessing cognitive functions related to daily life; however, few studies have assessed these skills in patients treated for nonsyndromic craniosynostosis. In this study, the authors assessed the adaptive behavior skills of children treated for craniosynostosis and examined whether their outcomes are related to surgical technique.

METHODS

The Adaptive Behavior Assessment System, 2nd Edition, parent report was used for children (age, 7 to 16 years) treated for sagittal (n = 41), metopic (n = 24), and other rare synostoses (n = 8). Background data, including intelligence quotient, were controlled for confounders.

RESULTS

All evaluated children treated for craniosynostosis were estimated as lower in all aspects of adaptive behavior skills (full-scale, conceptual, social, and practical composites; effect size, 0.36 to 0.44) as compared with norms. The sagittal group showed shortcomings in social composite (effect size, 0.48) and subscales measuring self-care and self-direction, although no difference was observed between spring-assisted surgery and pi-plasty regarding outcomes of adaptive behavior skills. In addition, children treated for metopic synostosis showed results indicating shortcomings with adaptive behavior according to the full-scale, conceptual, and social composites (effect size, 0.53 to 0.61) relative to norms. Furthermore, attrition analysis revealed no significant differences between responders (rate, 80.2 percent) and nonresponders.

CONCLUSION

These results found that children treated for craniosynostosis display average adaptive behavior skills, and that the two surgical techniques used to treat sagittal synostosis did not differ in their behavioral outcomes.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, III.

Morphologic Severity of Craniosynostosis: Implications for Speech and Neurodevelopment

BACKGROUND

Single-suture craniosynostosis (SSC) can be associated with neurodevelopmental deficits. We examined the correlation between morphologic severity and incidence of speech-language or psychological concerns.

METHODS

In 62 patients (33 sagittal, 17 metopic, and 12 unicoronal), morphologic severity was determined via preoperative computed tomography (CT). Severity metrics for sagittal, metopic, and unicoronal synostosis were adjusted cephalic index (aCI), interfrontal angle (IFA), and anterior cranial fossa area ratio (ACFR), respectively. Speech-language and psychological concerns were assessed at age ≥4.5 years and defined as recommendation for therapy or monitoring.

RESULTS

Mean assessment age was 5.7 years; 32% had a speech-language concern and 44% had a psychological concern; 44% had neither. Sagittal: Mean aCI of those with a speech-language concern (0.62) and those without (0.62) were equivalent (P = .580), as were mean aCI of those with a psychological concern (0.62) and those without (0.62; P = .572). Metopic: Mean IFA with (117.9) and without (125.2) a speech-language concern were equivalent (P = .326), as were mean IFA with (120.2) and without (123.2) a psychological concern (P = .711). Unicoronal: Mean ACFR with (0.65) and without (0.69) a psychological concern (P = .423) were equivalent. However, mean ACFR with (0.74) and without (0.63) a speech-language concern were not (P = .022*). Bivariate rank correlation showed significant association between morphologic severity and speech-language score only for unicoronal synostosis (ρ = .722; P = .008*).

CONCLUSION

A significant portion of patients with SSC had speech-language or psychological concerns. We found no correlation between morphologic severity and incidence of speech-language or psychological concerns for patients with sagittal or metopic synostosis. Morphological severity did correlate with speech concerns in patients with unicoronal synostosis.

Cranial Suture Regeneration Mitigates Skull and Neurocognitive Defects in Craniosynostosis

Craniosynostosis results from premature fusion of the cranial suture(s), which contain mesenchymal stem cells (MSCs) that are crucial for calvarial expansion in coordination with brain growth. Infants with craniosynostosis have skull dysmorphology, increased intracranial pressure, and complications such as neurocognitive impairment that compromise quality of life. Animal models recapitulating these phenotypes are lacking, hampering development of urgently needed innovative therapies. Here, we show that Twist1+/- mice with craniosynostosis have increased intracranial pressure and neurocognitive behavioral abnormalities, recapitulating features of human Saethre-Chotzen syndrome. Using a biodegradable material combined with MSCs, we successfully regenerated a functional cranial suture that corrects skull deformity, normalizes intracranial pressure, and rescues neurocognitive behavior deficits. The regenerated suture creates a niche into which endogenous MSCs migrated, sustaining calvarial bone homeostasis and repair. MSC-based cranial suture regeneration offers a paradigm shift in treatment to reverse skull and neurocognitive abnormalities in this devastating disease.

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.

Risk factors and time trends for isolated craniosynostosis

BACKGROUND

We sought to investigate associations between maternal/infant characteristics and isolated craniosynostosis as well as its subtypes sagittal, metopic, and coronal synostosis, and assess trends in the prevalence of these conditions.

METHODS

We identified cases in the Texas Birth Defects Registry from 1999 to 2014. We used Poisson regression to identify associations between maternal/infant characteristics and craniosynostosis. We used joinpoint regression and unadjusted Poisson regression to evaluate temporal trends. Finally, we computed adjusted Poisson models to evaluate whether temporal trends were evident after accounting for changes in the population distributions of maternal/infant characteristics over time.

RESULTS

Relative to all live births in the general population, cases were more frequently male or preterm. Mothers of cases were more frequently non-Hispanic white and more frequently obese. Non-Hispanic black or Hispanic maternal race/ethnicity was associated with a lower prevalence of all craniosynostosis subtypes. Previous live births were associated with sagittal synostosis; residence on the U.S.-Mexico border was associated with sagittal and coronal synostosis. The prevalence of any isolated craniosynostosis increased (average annual percent change estimated from joinpoint regression [AAPC]: 2.9%), as did the prevalences of sagittal (AAPC: 3.3%) and metopic synostosis (AAPC: 5.4%). In crude Poisson models, the same temporal trends were observed, however these were attenuated after adjusting for maternal/infant characteristics.

CONCLUSIONS

Prevalence of isolated craniosynostosis increased from 1999 to 2014. The largest AAPC was observed for metopic synostosis. Changes in the population distribution of associated maternal/infant characteristics may explain these trends.

Augmentative and Alternative Communication (AAC) Use Among Patients Followed by a Multidisciplinary Cleft and Craniofacial Team

OBJECTIVE

To establish preliminary data describing the number of patients who visit a multidisciplinary cleft and craniofacial team who use augmentative and alternative communication (AAC) supports.

DESIGN

This retrospective study consisted of chart reviews for all patients who visited a single site's multidisciplinary cleft and craniofacial team for 1 calendar year.

SETTING

A single multidisciplinary craniofacial team at a tertiary teaching hospital.

PARTICIPANTS

Four hundred sixty-four patients met the inclusion criteria for this study. Of these, 59.9% (n = 278) were male and 40.1% (n = 186) were female.

RESULTS

Of the sample population, 6.9% (n = 32) were AAC users as they received AAC intervention in a therapeutic context, while 93.1% (n = 432) were not. The AAC group had a mean age of 5.1 years (standard deviation [SD]: 4.2) and was 68.8% (n = 22) male. The non-AAC group had a mean age of 6.3 (SD: 4.9) and was 59.3% (n = 256) male. Within the AAC group, 40.6% (n = 13) were found to have an identified syndromic diagnosis in comparison to 17.6% (n = 76) of the non-AAC group (P = .003).

CONCLUSIONS

This is the first study to report the prevalence of AAC use among patients in the care of multidisciplinary cleft and craniofacial teams. Our findings suggest that a subset of craniofacial team patients may have complex communication disorders that require AAC supports. Craniofacial teams should be aware of resources available for these patients so that the patients' communication needs are met in the hospital, in school, and in the community.

Nonsyndromic Craniosynostosis Is Associated with Increased Risk for Psychiatric Disorders

BACKGROUND

Craniosynostosis is one of the most common craniofacial malformations demanding surgical treatment in infancy. Data on overall psychiatric morbidity among children with nonsyndromic craniosynostosis remain limited. This study investigated the risk of psychiatric disorders in nonsyndromic craniosynostosis.

METHODS

The authors reviewed a register-based cohort of all individuals born with nonsyndromic craniosynostosis in Sweden between 1973 to 1986 and 1997 to 2012 (n = 1238). The nonsyndromic craniosynostosis cohort was compared with a matched community cohort (n = 12,380) and with unaffected full siblings (n = 1485). The authors investigated the risk of psychiatric disorders, suicide attempts, and suicides by using Cox regression adjusted for perinatal and somatic factors, season and birth year, sex, parental socioeconomic factors, and parental psychiatric disorders.

RESULTS

Children with nonsyndromic craniosynostosis had a higher risk of any psychiatric disorder (adjusted Cox-derived hazard ratio, 1.70; 95 percent CI, 1.43 to 2.02), including intellectual disability (adjusted Cox-derived hazard ratio, 4.96; 95 percent CI, 3.20 to 7.70), language disorders (adjusted Cox-derived hazard ratio, 2.36; 95 percent CI, 1.57 to 3.54), neurodevelopmental disorders (adjusted Cox-derived hazard ratio, 1.30; 95 percent CI, 1.01 to 1.69), and other psychiatric disorders (adjusted Cox-derived hazard ratio, 1.43; 95 percent CI, 1.11 to 1.85). Full siblings with nonsyndromic craniosynostosis were more likely, in the crude analyses, to be diagnosed with any psychiatric disorder, including intellectual disability, language disorders, and neurodevelopmental disorders compared with nonaffected siblings. The higher risk for any psychiatric disorder and intellectual disability remained after adjusting for confounders.

CONCLUSIONS

Children with nonsyndromic craniosynostosis demonstrated higher risks of any psychiatric disorder compared with children without nonsyndromic craniosynostosis. This risk cannot fully be explained by familial influences (i.e., genetic or environmental factors).

CLINICAL QUESTION/LEVEL OF EVIDENCE

Risk, III.

Single-suture craniosynostosis: is there a correlation between preoperative ophthalmological, neuroradiological, and neurocognitive findings?

BACKGROUND

In spite of literature data stating that children with single-suture craniosynostosis have an increased risk for neuropsychological deficits, no data are present clarifying the potential risk factors.

METHODS

All children with non-syndromic single-suture craniosynostosis operated on from January 2014 to January 2017 were enrolled. A comprehensive neurocognitive and neuro-ophthalmological evaluation was performed before surgery and 6 months after surgery. A further neurocognitive evaluation was performed 12 months after surgery. All children had a preoperative CT/MR study.

RESULTS

One hundred forty-two patients were enrolled; 87 are affected by sagittal craniosynostosis, 38 by trigonocephaly, and 17 by plagiocephaly. A global neurocognitive impairment was documented in 22/87 children with scaphocephaly, 5/38 children with trigonocephaly, and 6/17 children with anterior plagiocephaly. There was a significant relationship between results of the ophthalmological evaluation, global IQ, and CT findings at diagnosis (r = 0.296, p < 0.001; r =0.187, p 0.05). Though a significant recovery was documented after surgery, a persistence of eye coordination deficits was present at 6 months in 1 out of 3 children with abnormal preoperative exams. A significant correlation was found between pathological CT findings and persistence of below average neuro-ophthalmological and neurocognitive findings 6 months after surgery, as well as between CT findings and neurocognitive scores at the 1 year follow-up (r = 0.411; p < 0.01).

CONCLUSION

The presence of neuroradiological abnormalities appears to be related to both ophthalmological and neurocognitive deficits at diagnosis. This relationship is maintained in spite of the surgical treatment in children who show the persistence of ophthalmological and neurocognitive deficits during the follow-up.

Syndromic and Systemic Diagnoses Associated With Isolated Sagittal Synostosis

Reports of systemic associations in patients with Isolated Sagittal Synostosis (ISS) are sparse. Craniofacial surgeons, and other providers, should be aware that a significant proportion of patients with ISS may have syndromic or systemic involvement. This study investigates the incidence of systemic disease and syndromic diagnosis in a cohort of patients presenting with ISS (ie, patients with sagittal synostosis without other sutural involvement).

Cognitive performance of preschool children with different types of non-syndromic craniosynostosis

Background:

Craniosynostosis is defined as a premature fusion of one or more cranial sutures. Several studies have revealed cognitive deficits in some children who had undergone surgery to treat craniosynostosis. However, no general distinction has been drawn in the cognitive abilities between the various types of craniosynostosis. The purpose of the present study was to analyze if there is a difference in cognitive and motor function among the different types of non-syndromic craniosynostosis in preschool children.

Methods:

Twenty-seven children with different types of non-syndromic craniosynostosis were assessed using the Wechsler Preschool and Primary Scale of Intelligence – Third Edition, as well as the Quantitative, Memory and Motor scales of McCarthy Scales of Children’s Abilities (MSCA). The children were aged between 3 and 5 years and 11 months. The various types of craniosynostosis were compared.

Results:

The unicoronal synostosis group performed significantly worse than the multisuture synostosis group on the MSCA Motor scale. No differences in cognitive functions were found between the various types of craniosynostosis.

Conclusions:

Children with unicoronal synostosis may experience impaired motor skills and screening of their motor ability is recommended.

Behavioral Disorders of Preschool Children With Non-Syndromic Craniosynostosis

Craniosynostosis is the premature closure of one or more cranial sutures that results in an abnormal skull shape. This condition has been associated with cognitive problems of different levels of severity in all developmental stages in a substantial percentage of children. However, the study of behavioral problems related to this condition has been scarce. The objective of this study was to determine if a sample of Mexican preschoolers with non-syndromic craniosynostosis had more clinical and adaptive behavioral problems than those of their peers. We assessed the behavior of 24 participants between 3 and 5 years of age with non-syndromic craniosynostosis as well as those of 27 healthy children. We used the Behavioral Assessment System for Children (BASC) parent's questionnaire. There were no significant differences between groups for any of the BASC scales, although a small proportion of children from both groups had high, clinically significant, scores on some of the Clinical, Adaptive and Global scales. While the relationship between craniosynostosis and behavioral problems is not clear, it is important to continue to assess conduct at several ages to detect possible problems that could be overlooked by the developmental characteristics during the preschool stage.