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01.12.2015 | Research article | Ausgabe 1/2015 Open Access

BMC Musculoskeletal Disorders 1/2015

Developmental pattern of the hip in patients with hereditary multiple exostoses

Zeitschrift:
BMC Musculoskeletal Disorders > Ausgabe 1/2015
Autoren:
Ya-Zhou Wang, Kwang-Won Park, Chang-Seon Oh, Yeong-Seub Ahn, Qing-Lin Kang, Sung-Taek Jung, Hae-Ryong Song
Wichtige Hinweise
Ya-Zhou Wang and Kwang-Won Park contributed equally to this work.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

YZW: literature review, implementation, manuscript preparation, and editing. KWP: study design, literature review, manuscript preparation, and editing. CSO: collection of data, implementation, and data analysis. YSA: collection of data, implementation, and data analysis. QLK: literature review, manuscript preparation, and editing. STJ: study design, literature review, manuscript preparation, and editing. HRS: study design, literature review, manuscript preparation, and editing. All authors read and approved the final manuscript.

Abstract

Background

Coxa valga is a common clinical feature of hereditary multiple exostoses (HME). The current study aimed to determine the unique developmental pattern of the hip in patients with HME and evaluate the factors that influence its progression.

Methods

Thirty patients (57 hips) with HME were divided into two groups according to the Hilgenreiner epiphyseal angle (HEA). Twenty-two patients (44 hips) including 13 men and 9 women were assigned to group 1 (HEA <25°), and 8 patients (13 hips) including 3 men and 5 women were assigned to group 2 (HEA ≥25°). The mean age at the initial presentation was 6.0 (4–12) years with 6.8 (4–11) years of follow-up in group 1, and 10.4 (8–13) years with 5.4 (2–9) years of follow-up in group 2. We measured the HEA, neck-shaft angle (NSA), acetabular index (AI), center-edge angle (CEA), and migration percentage (MP) for radiographic evaluation.

Results

Among the hips, 50 (87.7%) hips had coxa valga and 27 (47.4%) hips had abnormal MP (42.1% were borderline and 5.3% were subluxated). There was a significant difference in the HEA and NSA between the groups (p < 0.001 and p < 0.05, respectively). The HEA significantly correlated with the development of the NSA and no correlation was found between the HEA and AI, CEA, and MP.

Conclusions

There was a significant relationship between the HEA at the initial presentation and the NSA at skeletal maturity. We should consider guided growth for patients with lower HEA to prevent significant coxa valga deformity with close follow-up.
Literatur
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