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

Kanie, Yuya; Takenaka, Shota; Kitahara, Takayuki; Furuya, Masayuki; Ukon, Yuichiro; Fujimori, Takahito; Okada, Seiji; Kaito, Takashi

doi:https://doi.org/10.21037/jss-23-138

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

アクセス数:1,199件（2025-07-01 20:46 集計）

固定URL: https://hdl.handle.net/11094/97266

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タイトル	Appropriate pelvic obliquity measurement method in Lenke type 5C adolescent idiopathic scoliosis: a preliminary study
著者	NRID 1000010896377 1000010896377 researchmap permalink ykanie1985 ykanie1985 著者名 Kanie, Yuya
	NRID 1000040795861 1000040795861 著者名 Takenaka, Shota
	著者名 Kitahara, Takayuki
	NRID 1000020987466 1000020987466 researchmap permalink furuya1019 furuya1019 著者名 Furuya, Masayuki
	NRID 1000050964334 1000050964334 ORCID 0000-0002-0747-8854 0000-0002-0747-8854 researchmap permalink yuichiro.ukon yuichiro.ukon 著者名 Ukon, Yuichiro
	NRID 1000080546888 1000080546888 researchmap permalink fujimori_takahito fujimori_takahito Scopus Author ID 35271904600 35271904600 著者名 Fujimori, Takahito
	NRID 1000030448435 1000030448435 ORCID 0000-0002-5107-8209 0000-0002-5107-8209 researchmap permalink okadaseiji okadaseiji Scopus Author ID 35079139100 35079139100 著者名 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 著者名 Kaito, Takashi
キーワード等	Adolescent idiopathic scoliosis (AIS)
	iliac obliquity (IO)
	pelvic obliquity (PO)
	pelvic parameters
	sacral obliquity (SO)
内容	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.
抄録	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.
出版者	AME Publishing Company
収録物名	Journal of Spine Surgery
巻(号)	10(2)
ページ	255-263
刊行年月	2024-06-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/97266
PISSN	2414469X
eISSN	24144630
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.21037/jss-23-138
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Journal of Spine Surgery. 2024, 10(2), p. 255-263
DC.title	Appropriate pelvic obliquity measurement method in Lenke type 5C adolescent idiopathic scoliosis: a preliminary study
DC.creator	Kanie, Yuya
	Takenaka, Shota
	Kitahara, Takayuki
	Furuya, Masayuki
	Ukon, Yuichiro
	Fujimori, Takahito
	Okada, Seiji
	Kaito, Takashi
DC.publisher	AME Publishing Company
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-06-01
DC.identifier	https://doi.org/10.21037/jss-23-138
DC.subject	Adolescent idiopathic scoliosis (AIS)
	iliac obliquity (IO)
	pelvic obliquity (PO)
	pelvic parameters
	sacral obliquity (SO)
DC.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.
DCTERMS.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.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	97266
citation_title	Appropriate pelvic obliquity measurement method in Lenke type 5C adolescent idiopathic scoliosis: a preliminary study
citation_author	Kanie, Yuya
	Takenaka, Shota
	Kitahara, Takayuki
	Furuya, Masayuki
	Ukon, Yuichiro
	Fujimori, Takahito
	Okada, Seiji
	Kaito, Takashi
citation_publisher	AME Publishing Company
citation_language	英語
citation_date	2024-06-01
citation_journal_title	Journal of Spine Surgery
citation_volume	10
citation_issue	2
citation_firstpage	255
citation_lastpage	263
citation_doi	https://doi.org/10.21037/jss-23-138
citation_public_url	https://hdl.handle.net/11094/97266

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

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