Magnetic Resonance Imaging Evaluation of the Labrum to Predict Acetabular Development in Developmental Dysplasia of the Hip: A STROBE Compliant Study

Overview

Journal Medicine (Baltimore)

Specialty General Medicine

Date 2017 May 25

PMID 28538419

Citations 3

Authors

Yasuhiro Shirai

Kenjiro Wakabayashi

Ikuo Wada

Yoshiaki Tsuboi

Myongsu Ha

Takanobu Otsuka

Affiliations

Soon will be listed here.

Abstract

Recently, more attention has been paid to the role of the acetabular labrum. Therefore, we designed a retrospective cohort study of patients with residual hip dysplasia (RHD) who underwent magnetic resonance imaging (MRI). The objective of this study was to investigate an association between the MRI appearance of the labrum before school age and the natural history of RHD.We retrospectively investigated 45 hips of 40 patients who underwent MRI at about 3 and 4 years of age for RHD and were conservatively followed up with until 6 years of age or older. We evaluated the extent of eversion with a new method that measures the β angle (MRI β angle) using landmarks of the Graf method on MRI T2*-weighted images. The outcome measure was the Severin classification at the final follow-up. We compared the radiographic and MRI parameters at approximately 3 and 4 years of age between the good and poor outcome groups. The Student t test or one-way analysis of variance was used to compare the quantitative variables between groups. The Chi-square test was used to perform a ratio comparison.Although there was a significant difference in the center-edge (CE) angle, there was no significant difference in the acetabular index and the ratio of the presence of femoral head necrosis and the break in Shenton line between the good and poor groups. The MRI β angle was significantly greater in the poor outcome group than in the normal and good outcome groups. The cut-off value of the MRI β angle to differentiate the good and poor outcome groups was 65°, and its specificity and sensitivity were 92% and 53%, respectively.There was labral eversion on MRI scans in patients with RHD. Acetabular development before adolescence was poorer with greater labral eversion on MRI scans. The specificity for poor acetabular development was high when the MRI β angle was 65° or more. The MRI β angle has the potential to predict acetabular development.

Citing Articles

Cartilaginous predictors of residual acetabular dysplasia (RAD) in developmental dysplasia of the hip following closed or open reduction: A systematic review and meta-analysis.

Yang S, Su F, Jia H, Liu C, Lu Q, Yang Y Front Pediatr. 2023; 11:1124123.

PMID: 37063659 PMC: 10090413. DOI: 10.3389/fped.2023.1124123.

MRI hip morphology is abnormal in unilateral DDH and increased lateral limbus thickness is associated with residual DDH at minimum 10-year follow-up.

Schmaranzer F, Justo P, Kallini J, Ferrer M, Miller P, Matheney T J Child Orthop. 2023; 17(2):86-96.

PMID: 37034197 PMC: 10080238. DOI: 10.1177/18632521221144060.

The role of the labrum in early treatment of unstable developmental dysplasia of the hip.

De Pellegrin M, Montanari L, Moharamzadeh D, Eberhardt O EFORT Open Rev. 2019; 4(6):296-301.

PMID: 31312518 PMC: 6598608. DOI: 10.1302/2058-5241.4.180053.

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