Abstract
Background
Kabuki syndrome (KS) is a genetic disorder caused mainly by de novo pathogenic variants in KMT2D or KDM6A, characterized by recognizable facial features, intellectual disability, and multi-systemic involvement, including short stature, microcephaly, hearing loss, cardiac defects, and additional congenital anomalies. While congenital anomalies of the kidneys and urinary tract (CAKUT) are known manifestations of this disorder, studies focused solely on kidney involvement are scarce, and its prevalence is most likely underestimated. This study aimed to describe the prevalence and nature of CAKUT and other renal manifestations, in a cohort of KS patients followed at a single tertiary center.
Methods
All patients who were evaluated at the Sheba Medical Center and received a clinical and/or molecular diagnosis of KS, over a 16-year period (2004–2020), were included. Digital medical records, including ultrasound studies, were reviewed by a team of pediatric nephrologists.
Results
Thirteen patients were included in the study, at ages ranging from the neonatal period to 20 years. In eight patients, a pathogenic variant in KMT2D was established. CAKUT were detected in 8/13 (61.5%) of patients and varied from hypospadias, hydronephrosis, or double collecting systems to pelvic kidney, kidney asymmetry, horseshoe kidney, or kidney agenesis. One patient experienced kidney failure necessitating transplantation at 20 years of age.
Conclusions
Our findings underscore the high prevalence of CAKUT and genitourinary involvement in patients with KS and suggest that assessment by pediatric nephrology specialists is warranted as part of the routine multidisciplinary evaluation of newly diagnosed patients.
Graphical abstract
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Data Availability
The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.
Code availability
Not applicable.
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Acknowledgements
The authors wish to thank the patients and their families for their kind cooperation and assistance.
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R.M.-R., B.P.-S., and A.R.-R. initiated the study and substantially contributed to its conception and design, acquisition, analysis, and interpretation of the data and wrote the manuscript. A.V., E.L., M.K., O.C. and R.S. contributed to the recruitment of patients and acquisition of data. In addition, all authors critically reviewed the manuscript and approved the submitted version.
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The described research adhered to the tenets of the Declaration of Helsinki. The study was approved by the local Institutional Review Board (IRB).
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Supplementary data associated with this article can be found, in the online version, at http://dx.doi.org/
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Merdler-Rabinowicz, R., Pode-Shakked, B., Vivante, A. et al. Kidney and urinary tract findings among patients with Kabuki (make-up) syndrome. Pediatr Nephrol 36, 4009–4012 (2021). https://doi.org/10.1007/s00467-021-05216-3
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DOI: https://doi.org/10.1007/s00467-021-05216-3