Abstract
Beckwith–Wiedemann syndrome (BWS), an overgrowth disorder with several congenital abnormalities, encompasses nephrourological anomalies. The objective of the report is to analyze the latter and related genotype–phenotype correlations. The study was a retrospective review of nephrourological investigations and genotype in 67 BWS patients. Imaging and laboratory studies have been correlated with the molecular anomalies typical of BWS. Thirty-eight (56.7%) patients had a total of 61 nonmalignant nephrourological findings, including nephromegaly (n = 24), collecting system abnormalities (n = 14), cryptorchidism (n = 11), nephrolithiasis (n = 5), cysts (n = 5), and dysplasia (n = 1). Four patients had Wilms’ tumor, all associated with renal hyperplasia. Renal findings were almost consistent in the BWSIC1 group, with nephromegaly in all patients and collecting system abnormalities in half of them. BWSUPD and negative patients also had frequent anomalies (63.6% and 61.9% respectively), whereas only 36.0% of BWSIC2 had renal findings (p = 0.003). Cryptorchidism was associated with abdominal wall defects (p < 0.001) appearing more frequently in BWSIC2 (p = 0.028). Urinary tract infections were observed in 17.9% of patients, with two resulting in life-threatening sepsis. Hypercalciuria was present in 10% of cases. 55.5% of BWS patients have renal findings. Although variegate, these anomalies disclose a genotype–phenotype correlation.
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Abbreviations
- BWS:
-
Beckwith–Wiedemann syndrome
- GOM:
-
Gain of methylation
- IC:
-
Imprinting center
- IGF2:
-
Insulin growth factor 2
- LOM:
-
Loss of methylation
- UPD:
-
Uniparental disomy
- WT:
-
Wilms’ tumor
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Acknowledgement
This work was supported by funding from the grants MIUR (Italian Ministry for Education, University and Research) PRIN 2007 (to AR) and ISS526D/35 (to LL). The authors declare that they have no conflict of interest with respect to this article. GBF had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
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Mussa, A., Peruzzi, L., Chiesa, N. et al. Nephrological findings and genotype–phenotype correlation in Beckwith–Wiedemann syndrome. Pediatr Nephrol 27, 397–406 (2012). https://doi.org/10.1007/s00467-011-2009-4
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DOI: https://doi.org/10.1007/s00467-011-2009-4