Growth Curves for Intracranial Volume and Two-dimensional Parameters for Japanese Children without Cranial Abnormality: Toward Treatment of Craniosynostosis

Tomita, Yumiko; Kameda, Masahiro; Senoo, Takaya; Tokuyama, Eijiro; Sugahara, Chiaki; Yabuno, Satoru; Okazaki, Yosuke; Kawauchi, Satoshi; Hosomoto, Kakeru; Sasaki, Tatsuya; Yasuhara, Takao; Date, Isao

doi:10.2176/nmc.oa.2021-0208

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…Tomita et al performed a cross-sectional study of intracranial volume using CT in healthy Japanese children and calculated the approximate equations for each age group by sex. 9 ) According to their results, the predicted values for males/females at T1, T2, and T3 were 631/550 mL, 839/756 mL, and 970/886 mL, respectively, which were similar to the measurements obtained in the present study. The other parameters (CrL, CrW, CrH) also showed similar trends to those in Tomita's report, 9 ) confirming that the measurements of the 3D scanner were almost as good as those of CT.…”

Section: Discussionsupporting

confidence: 89%

“…4) However, these approaches have not been widely used in Japan because there are no reference 3D scanner measurements of infant head shapes. Although databases for longitudinal 3D scanner measurements of infant head shapes have been established overseas, [5][6][7] reports describing similar shape trends in normal Japanese infants are based on CT. 8,9) We have previously reported changes in symmetry-related parameters such as cranial asymmetry (CA), the cranial vault asymmetry index (CVAI), anterior symmetry ratios, and posterior symmetry ratios using a 3D scanner from 1 to 6 months of age and found that the incidence of symmetry-related parameters and deformational plagiocephaly (DP) worsened up to 3 months of age and then improved over the next 3 months. 10) In that study, we examined the trends in growth-related parameters and identified the need to clarify the relationship between DP and growth-related parameters.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating Cranial Growth in Japanese Infants Using a Three-dimensional Scanner: Relationship between Growth-related Parameters and Deformational Plagiocephaly

Miyabayashi

Nagano

Hashimoto³

et al. 2022

Neurol. Med. Chir.(Tokyo)

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In this study, we aimed to evaluate the longitudinal changes in the cranial shape of healthy Japanese infants using a three-dimensional scanner and construct a normal values database for the growth process. Preterm infants (gestational age < 37 weeks), infants with neonatal asphyxia (5-minute Apgar score of <7), and patients who started helmet therapy for deformational plagiocephaly were excluded from this study. The first scan was performed at approximately 1 month of age, followed by two scans conducted at 3 and 6 months of age. The parameters considered were as follows: cranial length, width, height, circumference, volume, cranial vault asymmetry index, and cephalic index. A cranial vault asymmetry index >5% was defined as deformational plagiocephaly. Changes in each parameter were examined using repeated-measures analysis of variance classified by sex and deformational plagiocephaly status. The rate of increase in each parameter was also examined. In total, 88 infants (45 boys and 43 girls) were included in this study. All growth-related parameters were noted to increase linearly with time. Sex differences were observed in all parameters except cranial length. Deformational plagiocephaly was found to have no effect on growth-related parameters. Cranial volume increased by 60% from 1 to 6 months of age. The growth almost uniformly influenced the rate of increase in volume in each coordinate axis direction. Overall, the mean trends in three-dimensional parameters in infants up to 6 months of age were obtained using a three-dimensional scanner. These trends could be used as a guide by medical professionals involved in cranioplasty.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Evaluating Cranial Growth in Japanese Infants Using a Three-dimensional Scanner: Relationship between Growth-related Parameters and Deformational Plagiocephaly

Miyabayashi

Nagano

Hashimoto³

et al. 2022

Neurol. Med. Chir.(Tokyo)

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“…Several studies have reported the mean CI in Japan. 6 - 8 ) Koizumi et al reported a mean CI of 86.5 in children 0-3 years old. 7 ) Tomita et al reported a mean CI of 87.3 in 0-6 years old Japanese children without cranial abnormality.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, the severity of asymmetry according to CVAI values was subcategorized based on Japanese standards as follows: mild (5%-7%), moderate (7%-10%), severe (10%-14%), and very severe (>14%). 4 - 6 ) The maximum width and length were also measured to calculate the cephalic index (CI; CI = [cephalic length / cephalic width] × 100). Based on Japanese standards, mild brachycephaly was defined as a CI of 94 or above, and severe brachycephaly was defined as a CI of 101 or above.…”

Section: Methodsmentioning

confidence: 99%

Prevalence and Severity of Positional Posterior Plagiocephaly and Positional Posterior Brachycephaly in Children and Adolescents in Japan

AKUTSU,

KOYAMA,

KAWAMURA

et al. 2024

Neurol. Med. Chir.(Tokyo)

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This study aimed to assess the prevalence, severity, and natural history of positional posterior plagiocephaly (PPP) and positional posterior brachycephaly in Japan. We conducted a cross-sectional study of pediatric patients, ranging from 0 to 15 years old, evaluated for head trauma with negative computed tomography (CT) findings. The cranial vault asymmetry index (CVAI) was calculated using CT images at the superior orbital rim. Asymmetry according to CVAI values was subcategorized as follows: mild (3.5%-7%), moderate (7%-12%), and severe (>12%). The results were analyzed according to different age groups: group 1, 2-23 months (54 patients); group 2, 2-6 years (123 patients); and group 3, 7-15 years (123 patients). Overall, 300 patients were included (109 [36.3%] girls and 191 [63.7%] boys). The overall prevalence of PPP in the 300 patients was 46.7% (140 patients). PPP prevalence decreased consistently with age group: group 1, 57.4%; group 2, 47.2%; and group 3, 41.5%. Severe asymmetry was seen in all age groups. The overall mean cephalic index (CI) was 85.2. Cephalic index scores decreased consistently with age: group 1, 87.4; group 2, 85.1; and group 3, 84.3. The prevalence of PPP in Japan was higher than that reported in other countries. Although there was an overall decrease in the prevalence and severity of PPP with increasing patient age, PPP does not necessarily resolve spontaneously in all children. Furthermore, severe asymmetry was seen across all age groups.

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“…The volume of the skull cavity was automatically measured by the software. Tomita et al measured the intracranial volume of normal boys and girls of different ages and created an intracranial volume curve ( 8 ), we used the data from that study as the normal control group to quantitatively analyze the changes in intracranial volume before and after the operation.…”

Section: Methodsmentioning

confidence: 99%

Bilateral fronto-orbital advancement combined with cranial vault release using a free-floating bone flap technique for nonsyndromic unilateral coronal synostosis

Liang,

Chen,

Yang

et al. 2023

Transl Pediatr

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Background The goals of operative treatment for unilateral coronal synostosis (UCS) are to improve appearance and allow unrestricted brain growth. However, for severe unilateral premature closure of the coronal suture, existing methods do not address the compression of the brain or expand the volume of the skull cavity. We report our retrospective experience with bilateral fronto-orbital advancement combined with cranial vault release using a free-floating bone flap (CVR + FFBF) technique and the resulting changes in the anterior cranial vault asymmetry index (ACVAI) and intracranial volume. Methods Twenty patients with UCS who underwent bilateral fronto-orbital advancement combined with CVR + FFBF technique from April 2014 to May 2019 were included. Surgical efficacy was evaluated by the ACVAI and intracranial volume before the operation, 1 week after the operation, and at the last follow-up (average 19.8 months; range, 12 to 40 months). The measurement data are presented as the mean ± standard deviation and were statistically analyzed by t -test. Results The ACVAI was 9.07%±3.55% before the operation, 3.56%±3.42% 1 week after the operation, and 3.13%±2.41% at the last follow-up. The ACVAI 1 week after the operation was significantly lower than that before the operation ( t =4.827, P<0.001). There was no significant difference between the ACVAI 1 week after the operation and at the last follow-up ( t =0.660, P=0.517). The intracranial volume was 1,027.85±112.25 mL in patients before the operation and 1,131.92±161.71 mL in the normal control group, which was a statistically significant difference ( t =2.364, P=0.023). The intracranial volume significantly increased 1 week after surgery: 1,081.62±111.10 mL ( t =8.703, P<0.001), and this trend continued at the last follow-up (1,386.90±119.30 mL) similarly to the normal control group (1,438.22±89.28 mL). At the last follow-up, there was no significant difference between the two groups ( t =1.540, P=0.132). Conclusions For the treatment of UCS, bilateral fronto-orbital advancement combined with CVR + FFBF technique offers functional and cosmetic outcomes in terms of intracranial volume expansion and fronto-orbital symmetry.

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Growth Curves for Intracranial Volume and Two-dimensional Parameters for Japanese Children without Cranial Abnormality: Toward Treatment of Craniosynostosis

Cited by 8 publications

References 27 publications

Evaluating Cranial Growth in Japanese Infants Using a Three-dimensional Scanner: Relationship between Growth-related Parameters and Deformational Plagiocephaly

Evaluating Cranial Growth in Japanese Infants Using a Three-dimensional Scanner: Relationship between Growth-related Parameters and Deformational Plagiocephaly

Prevalence and Severity of Positional Posterior Plagiocephaly and Positional Posterior Brachycephaly in Children and Adolescents in Japan

Bilateral fronto-orbital advancement combined with cranial vault release using a free-floating bone flap technique for nonsyndromic unilateral coronal synostosis

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