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Clinical and diagnostic utility of genomic sequencing for children referred to a Kidney Genomics Clinic with microscopic haematuria.
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- Author(s): Shanks, Josiah; Butler, Grainne; Cheng, Daryl; Jayasinghe, Kushani; Quinlan, Catherine
- Source:
Pediatric Nephrology. Aug2023, Vol. 38 Issue 8, p2623-2630. 8p. 5 Charts. - Source:
- Additional Information
- Subject Terms:
- Abstract: Background: Microscopic haematuria in children is associated with the risk of progression to chronic kidney disease. Genetic disease is an important potential aetiology. Genomic sequencing presents the most effective diagnostic route for these conditions, but access remains inequitable internationally. Methods: We conducted a retrospective review of the electronic medical records of a Kidney Genomics Clinic (KGC) from January 2016 to December 2021. Results: Sixty patients were referred to the KGC with haematuria over this period. Forty-three percent of patients had analysis of a limited haematuria panel (COL4A1, COL4A3, COL4A4, COL4A5, MYH9) with 58% receiving a genetic diagnosis. Forty-two percent of referred patients had further analysis of genes implicated in the development of kidney disease, and 36% received a diagnosis. Eight percent of patients underwent cascade testing for a known familial variant, and all received a diagnosis. Children with the highest levels of haematuria (> 500 × 106/L red blood cells) had the highest diagnostic yield (67%). Proteinuria, defined as a urinary protein to creatinine ratio > 20, increased the diagnostic yield from 31 to 65%. Importantly, negative genetic analysis can still have significant clinical utility for patients by altering surveillance and further management; the genetic result had clinical utility in 60% of patients. Conclusions: Our KGC review highlights the substantial clinical utility and diagnostic yield of genomic analysis for microscopic haematuria in paediatric patients. Whilst the management of variants of uncertain significance can be challenging, a multidisciplinary team including genetic counselling can help ensure these patients are followed up meaningfully. [ABSTRACT FROM AUTHOR]
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