Appropriate pelvic obliquity measurement method in Lenke type 5C adolescent idiopathic scoliosis: a preliminary study

Kanie, Yuya; Takenaka, Shota; Kitahara, Takayuki et al.

Journal of Spine Surgery, 2024, 10(2), 255-263

Number of Access:1,559（2025-07-24 10:10 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/97266

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Title
Appropriate pelvic obliquity measurement method in Lenke type 5C adolescent idiopathic scoliosis: a preliminary study
Creator
NRID
1000010896377 1000010896377
researchmap permalink
ykanie1985 ykanie1985
CreatorName
Kanie, Yuya
NRID
1000040795861 1000040795861
CreatorName
Takenaka, Shota
CreatorName
Kitahara, Takayuki
NRID
1000020987466 1000020987466
researchmap permalink
furuya1019 furuya1019
CreatorName
Furuya, Masayuki
NRID
1000050964334 1000050964334
ORCID
0000-0002-0747-8854 0000-0002-0747-8854
researchmap permalink
yuichiro.ukon yuichiro.ukon
CreatorName
Ukon, Yuichiro
NRID
1000080546888 1000080546888
researchmap permalink
fujimori_takahito fujimori_takahito
Scopus Author ID
35271904600 35271904600
CreatorName
Fujimori, Takahito
NRID
1000030448435 1000030448435
ORCID
0000-0002-5107-8209 0000-0002-5107-8209
researchmap permalink
okadaseiji okadaseiji
Scopus Author ID
35079139100 35079139100
CreatorName
Okada, Seiji
NRID
1000070623982 1000070623982
ORCID
0000-0003-4882-2997 0000-0003-4882-2997
researchmap permalink
911_0 911_0
Scopus Author ID
25824322100 25824322100
CreatorName
Kaito, Takashi
Subject
Adolescent idiopathic scoliosis (AIS)
iliac obliquity (IO)
pelvic obliquity (PO)
pelvic parameters
sacral obliquity (SO)
Description
Kanie Y., Takenaka S., Kitahara T., et al. Appropriate pelvic obliquity measurement method in Lenke type 5C adolescent idiopathic scoliosis: a preliminary study. Journal of Spine Surgery 10, 255 (2024); https://doi.org/10.21037/jss-23-138.
Abstract
Background: Although pelvic obliquity (PO) is a risk factor for postoperative coronal decompensation in corrective surgery in adolescent idiopathic scoliosis (AIS), especially Lenke 5C, methods of measuring PO are controversial. This study aimed to establish an appropriate measurement method using multiplanar reconstructed computed tomography (MPR-CT) images instead of standing posteroanterior (PA) whole-spine radiographs to evaluate PO in patients with Lenke 5C AIS. Methods: This study was a retrospective cross-sectional study. Twenty-five patients who underwent corrective surgery for AIS in Osaka University Hospital from August 2014 to February 2023 were included. Cobb angle, L5 tilt, C7 plumb line to center sacral vertebral line (C7PL-CSVL), and leg length discrepancy (LLD) were measured on standing PA whole-spine radiographs preoperatively. Sacral obliquity (SO), the slope of the upper endplate of S1, and iliac obliquity (IO), the tilt of the line connecting the iliac crests, were measured on standing PA whole-spine radiographs and MPR-CT (SO/IO-X-ray, SO/IO-CT, respectively). S1 angle and S2 angle were measured on CT. Results: The mean age of the patients was 18.7±3.9 years and all of them were females. SO-X-ray and SO-CT were larger than IO-X-ray and IO-CT, respectively. SO-X-ray was highly correlated with SO-CT (r=0.838, P<0.001). L5 tilt had higher correlation with SO-CT (r=0.884, P<0.001) than with SO-X-ray (r=0.726, P=0.001) and IO-CT (r=0.550, P=0.22). L5 tilt was correlated poorly with IO-X-ray (r=0.104, P=0.69). The S1 angle was 4.5±3.5° meanwhile the S2 angle was 1.2±2.1°, the sacral deformity was mainly due to the S1 vertebral wedging. Conclusions: Given the asymmetric sacral morphology, SO is more appropriate pelvic parameter than IO to represent the sacral tilt of Lenke 5C AIS, especially when measured using CT images to overcome the poor visibility on PA whole-spine radiographs.
Publisher
AME Publishing Company
Source Title
Journal of Spine Surgery
Volume (Issue)
10(2)
Page
255-263
Date of Issued
2024-06-01
Language
English
Handle URL
https://hdl.handle.net/11094/97266
PISSN
2414469X
eISSN
24144630
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.21037/jss-23-138
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article