Assessment of irreducible aspects in developmental hip dysplasia by magnetic resonance imaging

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RESEARCH ARTICLE

Open Access

Assessment of irreducible aspects in developmental hip dysplasia by magnetic resonance imaging Huihui Jia1†, Liang Wang2†, Yan Chang3, Yongrui Song1, Yuqi Liu1, Fuyong Zhang4, Jie Feng1, Xiaodong Yang3 and Mao Sheng1*

Abstract Background: The developmental dysplasia of the hip (DDH) can cause a wide range of pathological changes, and often requires surgical treatment. Preoperative evaluation is very important for DDH. We aimed to assess the diagnostic capability of magnetic resonance imaging (MRI) for irreducible aspects preventing hip reduction in DDH. Methods: A total of 39 pediatric patients who received DDH evaluation in pediatric orthopedics from January 2015 to December 2019 were included. The samples included 4 cases of bilateral DDH and 35 cases of unilateral DDH, a total of 43 hip joint samples. All patients underwent surgical treatment, pathological examination and MRI of hip joint. Results: With pathological results or intraoperative findings as the gold standard, the sensitivity and specificity of MRI were 90.3% and 83.3% for the affected labrum, 92% and 83.3% for thickening of the round ligament, 90.0% and 91.3% for atrophy of the iliopsoas muscle, and 100% and 100% for fibrofatty pulvinar tissue and joint effusion, respectively. Conclutions: The MRI showed an extraordinary capability of detecting these irreducible factors and helped surgeon choose the appropriate treatment strategies. Keywords: Irreducible factors, Developmental dysplasia of the hip, MR imaging

Background Developmental dysplasia of the hip (DDH) encompasses a wide spectrum of pathology, ranging from complete fixed dislocation at birth to asymptomatic acetabular dysplasia in adulthood [1], which can negatively affect hip development and can lead to isolated acetabular dysplasia, subluxation, complete dislocation of the hip joint, or permanent abnormal gait [2, 3]. The children with untreated persistent DDH may suffer from pain due to a * Correspondence: [email protected] † Huihui Jia and Liang Wang should be considered as co-first authors. 1 Department of Radiology, Children’s Hospital of Soochow University, Suzhou 215000, PR China Full list of author information is available at the end of the article

series of anatomical changes such as increased abnormal articular pressure or increased tension on a smaller contact area during the process of growth and development. With the development of DDH, the degeneration of the articular cartilage, early coxarthrosis, and ischemic necrosis of the femoral head would likely happen in children [4]. Result from less invasive and more effective, early diagnosis and treatment plays important roles in restoring the normal relationship between the acetabulum and femoral head and avoiding further complications that come with growth [5]. According to the American College of Radiology (ACR) guides, the most important diagnosis method of DDH is on the basis of the results

© The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4