Clinical and radiological assessment of scoliosis in Koolen‐de Vries syndrome

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Abstract
The Koolen‐de Vries syndrome (KdVS) is a multisystem disorder characterized by developmental delay, intellectual disability, characteristic facial features, epilepsy, cardiovascular and urogenital malformations, and various musculoskeletal disorders. Scoliosis is a common feature. The aim of this study is to fill the gap in the current knowledge about scoliosis in individuals with KdVS and to provide recommendations for management and follow‐up. In total, 54 individuals with KdVS were included in the study, with a mean age of 13.6 years (range 1.9–38.8 years). Spine radiographs, MR scans, and corresponding radiology reports were analyzed retrospectively for scoliosis and additional anomalies. The presence of scoliosis‐related clinical conditions was assessed in participants' medical records and by use of a parent survey. Scoliosis was present in 56% of the participants (30/54) with a mean age of onset of 10.6 years and curve progression during the growth spurt. Prevalence at age 6, 10, and 18 years was, respectively, 9%, 41%, and 65%. Most participants were diagnosed with a single curve (13/24, 54%), of which five participants had a long C‐curve type scoliosis. No significant risk factors for development of scoliosis could be identified. Severity was mostly classified as mild, although 29% (7/24) of the curves were larger than 30° at last follow‐up. Bracing therapy was received in 13% (7/54), and surgical spinal fusion was warranted in 6% (3/54). Remarkably, participants with scoliosis received less often physical therapy compared to participants without scoliosis (P = 0.002). Scoliosis in individuals with KdVS should be closely monitored and radiologic screening for scoliosis and vertebrae abnormalities is recommended at diagnosis of KdVS, and the age of 10 and 18 years.

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