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- W2317162261 abstract "Developmental dysplasia of the hip is a spectrum disorder of hip development that ranges in severity from abnormal acetabular morphology to complete hip dislocation. While treatment with a Pavlik harness is highly effective in infants younger than 6 months, older infants and children and those with orthotic failure often warrant surgical reduction and placement of a spica cast, which limits subsequent imaging evaluation. Magnetic resonance (MR) imaging has been described in the evaluation of the adequacy of hip reduction for more than 2 decades, but the practice is still not widespread and is performed routinely at relatively few centers. MR imaging is a robust tool for outcome assessment after hip reduction and placement of a spica cast, facilitating multiplanar confirmation of concentric reduction independent of an ossific nucleus or orthopedic hardware. Excellent image contrast of soft tissues allows identification of obstacles to concentric reduction, which may be extra-articular or intra-articular. Extra-articular obstacles include tightening of the adductor muscles and tightening of the iliopsoas tendon with constriction of the joint capsule. Intra-articular obstacles include limbus formation, labral inversion, an enlarged pulvinar, and hypertrophy of the ligamentum teres and/or the transverse acetabular ligament. Intravenous contrast material administration may demonstrate altered epiphyseal blood flow and help identify patients at risk for early ischemia. Imaging technique and image interpretation can be optimized to facilitate the performance of postreduction MR imaging studies where they may be of benefit. ©RSNA, 2016" @default.
- W2317162261 created "2016-06-24" @default.
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- W2317162261 date "2016-05-01" @default.
- W2317162261 modified "2023-09-23" @default.
- W2317162261 title "MR Imaging in Postreduction Assessment of Developmental Dysplasia of the Hip: Goals and Obstacles" @default.
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- W2317162261 doi "https://doi.org/10.1148/rg.2016150159" @default.
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