Validation of Optical Three-Dimensional Plagiocephalometry by Computed Tomography, Direct Measurement, and Indirect Measurements Using Thermoplastic Bands

Using a 3D asymmetry index as a novel form for capturing complex three-dimensionality in positional plagiocephaly

Positional plagiocephaly (PP) is the most common skull deformity in infants. Different classification systems exist for graduating the degree of PP, but all of these systems are based on two-dimensional (2D) parameters. This limitation leads to several problems stemming from the fact that 2D parameters are used to classify the three-dimensional (3D) shape of the head. We therefore evaluate existing measurement parameters and validate a newly developed 3D parameter for quantifying PP. Additionally, we present a new classification of PP based on a 3D parameter. 210 patients with PP and 50 patients without PP were included in this study. Existing parameters (2D and 3D) and newly developed volume parameters based on a 3D stereophotogrammetry scan were validated using ROC curves. Additionally, thresholds for the new 3D parameter of a 3D asymmetry index were assessed. The volume parameter 3D asymmetry index quantifies PP equally as well as the gold standard of 30° diagonal difference. Moreover, a 3D asymmetry index allows for a 3D-based classification of PP. The 3D asymmetry index can be used to define the degree of PP. It is easily applicable in stereophotogrammetric datasets and allows for comparability both intra- and inter-individually as well as for scientific analysis.

Child Abuse and Deformational Plagiocephaly in a West Texas Hospital System

Background  The aim of this study was to assess deformational plagiocephaly’s (DP) predictive value in neglect and physical abuse (nonaccidental trauma [NAT]) within the pediatric population. In addition, we sought to characterize the prevalence of DP and NAT for our hospital’s mostly rural catchment area.

Methods  Data on hospitalized patients diagnosed with NAT and/or neglect between 2012 and 2018 were collected via retrospective chart review. All enrolled children were younger than the age of 4 years at the time of diagnosis, and those without legible head computed tomographies or magnetic resonance images during their initial hospitalization were excluded. Utilizing neuroimaging, we calculated the cranial vault asymmetry index (CVAI) and cranial index for each patient to assess for DP. Differences between the two groups were assessed using Wilcoxon’s rank-sum test for continuous variables and Fisher’s exact test for categorical variables. A p -value of 0.05 or less was considered statistically significant. All analyses were conducted using SAS 9.4 (Cary, North Carolina, United States).

Results  The prevalence of DP within the combined cohort of NAT and neglect patients is 21%, similar to that reported in the literature for the general population (20–50%). There was no significance between the prevalence of DP and a history of NAT ( p > 0.1) or neglect ( p > 0.1). Furthermore, there was no correlation between CVAI and characteristics of initial presentation or history of trauma for either NAT ( p -values: 0.359 and 0.250, respectively) or neglect groups ( p -values: 0.116 and 0.770, respectively).

Conclusion  While there are many limitations to this study, our results suggest that abused children are no more likely to have history of DP than the general population, and the degree of DP is not associated with severity of trauma history or initial presentation. We hope the results of this study promote future investigations for unique and subtle predictive factors of child abuse/neglect.

Methods to Diagnose, Classify, and Monitor Infantile Deformational Plagiocephaly and Brachycephaly: A Narrative Review

OBJECTIVE

The purpose of this study is to review the literature for possible methods in diagnosing, classifying, and monitoring deformational plagiocephaly and brachycephaly.

METHODS

A search was conducted on articles through February 2014 in PubMed (Medline) and Google Scholar. Articles were included if they met the following criteria: (1) they were written in English or German; (2) they involved humans; (3) they were published in the last 10 years; (4) they had a primary research question about all possible methods for diagnosing, classifying, and monitoring deformational plagiocephaly and brachycephaly; and (5) an abstract was available.

RESULTS

The search resulted in 58 articles. After the review, the number was reduced to 16. Of the 16 articles included, 9 were reliability studies on measurements of deformational plagiocephaly. Six measurement tools for diagnosing, classifying, and monitoring deformational plagiocephaly and brachycephaly were found: visual assessment, anthropometric measurements with a caliper, measurements with a flexicurve, plagiocephalometry, 3-dimensional photography, and radiological imaging.

CONCLUSION

This study found that visual assessment, flexicurve, anthropometric measurements with a caliper, and plagiocephalometry are useful measurements. At present, the plagiocephalometry and the anthropometric measurements with a caliper are more reliable methods than the visual assessment and the measurement with a flexicurve.