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First description of frequent occurrence of supernumerary lumbar ribs and transitional vertebrae in children with Williams–Beuren syndrome

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Abstract

Background

Williams–Beuren syndrome is a rare multisystemic genetic disorder with an incidence of 1 in 7,500 live births. Because these children often have scoliosis, they undergo routine radiographic examinations of the spine. During these examinations we have found many children with supernumerary lumbar ribs arising from the first lumbar vertebra, often associated with lumbosacral transitional vertebrae.

Objective

To describe the incidence of supernumerary ribs and transitional vertebrae in children with Williams–Beuren syndrome and compare it to the incidence in a general population. Our hypothesis is that these findings are common, but they have not been described in the literature concerning Williams–Beuren syndrome.

Materials and methods

From January 2015 to October 2021, 308 patients (138 male) with Williams–Beuren syndrome were treated at our hospital. Of these, 106 (47 male) underwent diagnostic imaging, mostly for suspected scoliosis. Panoramic radiographs of the whole spine were performed in 88 patients and radiographs of regions of the spine, chest radiographs, CT, MRI or fluoroscopy in 18 patients. We retrospectively analysed the images concerning the number of ribs and vertebrae. We correlated the frequency of lumbar ribs and transitional vertebrae in comparison to a general population as described in the literature.

Results

After exclusions for insufficient imaging, we analysed imaging in 91 patients. Of these, 67 patients (73.6%) had 13 ribs, of which 85% were located on both sides, 9% on the right and 6% on the left side. Of the 67 patients with supernumerary lumbar ribs, 38 (57%) also had transitional vertebrae.

Conclusion

Supernumerary lumbar ribs arising from the first lumbar vertebra, often accompanied by lumbosacral transitional vertebrae, are common in children with Williams–Beuren syndrome.

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Authors and Affiliations

  1. Klinik für Diagnostische und Interventionelle Radiologie, Helios Klinikum Duisburg, Dieselstraße 185, 47166, Duisburg, Germany

    Annette Schmitz & Marco Das

  2. Klinik für Kinder und Jugendliche/Perinatalzentrum, Helios Klinikum Duisburg, Dieselstraße 185, 47166, Duisburg, Germany

    Elke Reutershahn & Peter Seiffert

Authors
  1. Annette Schmitz
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  2. Elke Reutershahn
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  4. Marco Das
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Correspondence to Annette Schmitz.

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Schmitz, A., Reutershahn, E., Seiffert, P. et al. First description of frequent occurrence of supernumerary lumbar ribs and transitional vertebrae in children with Williams–Beuren syndrome. Pediatr Radiol 53, 244–248 (2023). https://doi.org/10.1007/s00247-022-05493-6

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