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Pediatric Radiology
Published in: Pediatric Radiology 10/2016

01-09-2016 | Original Article

Small vertebral cross-sectional area and tall intervertebral disc in adolescent idiopathic scoliosis

Authors: Skorn Ponrartana, Carissa L. Fisher, Patricia C. Aggabao, Thomas A. Chavez, Alexander M. Broom, Tishya A. L. Wren, David L. Skaggs, Vicente Gilsanz

Published in: Pediatric Radiology | Issue 10/2016

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Abstract

Background

When compared to boys, girls have smaller vertebral cross-sectional area, which conveys a greater spinal flexibility, and a higher prevalence of adolescent idiopathic scoliosis.

Objective

To test the hypothesis that small vertebral cross-sectional area and tall intervertebral disc height are structural characteristics of patients with adolescent idiopathic scoliosis.

Materials and methods

Using multiplanar imaging techniques, measures of vertebral cross-sectional area, vertebral height and intervertebral disc height in the lumbar spine were obtained in 35 pairs of girls and 11 pairs of boys with and without adolescent idiopathic scoliosis of the thoracic spine matched for age, height and weight.

Results

Compared to adolescents without spinal deformity, girls and boys with adolescent idiopathic scoliosis had, on average, 9.8% (6.68 ± 0.81 vs. 7.40 ± 0.99 cm2; P = 0.0007) and 13.9% (8.22 ± 0.84 vs. 9.55 ± 1.61 cm2; P = 0.009) smaller vertebral cross-sectional dimensions, respectively. Additionally, patients with adolescent idiopathic scoliosis had significantly greater values for intervertebral disc heights (9.06 ± 0.85 vs. 7.31 ± 0.62 mm and 9.09 ± 0.87 vs. 7.61 ± 1.00 mm for girls and boys respectively; both P ≤ 0.011). Multiple regression analysis indicated that the presence of scoliosis was negatively associated with vertebral cross-sectional area and positively with intervertebral disc height, independent of sex, age and body mass index.

Conclusion

We provide new evidence that girls and boys with adolescent idiopathic scoliosis have significantly smaller vertebral cross-sectional area and taller intervertebral disc heights – two major structural determinants that influence trunk flexibility. With appropriate validation, these findings may have implications for the identification of children at the highest risk for developing scoliosis.
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Metadata
Title
Small vertebral cross-sectional area and tall intervertebral disc in adolescent idiopathic scoliosis
Authors
Skorn Ponrartana
Carissa L. Fisher
Patricia C. Aggabao
Thomas A. Chavez
Alexander M. Broom
Tishya A. L. Wren
David L. Skaggs
Vicente Gilsanz
Publication date
01-09-2016
Publisher
Springer Berlin Heidelberg
Published in
Pediatric Radiology / Issue 10/2016
Print ISSN: 0301-0449
Electronic ISSN: 1432-1998
DOI
https://doi.org/10.1007/s00247-016-3633-8

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