Evaluation of Genetic Testing in a Cohort of Diverse Pediatric Patients in the United States with Congenital Cataracts

Jennifer L. Rossen*, Brenda L. Bohnsack, Kevin X. Zhang, Alexander Ing, Andy Drackley, Valerie Castelluccio, Hanta Ralay-Ranaivo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The aim of this study was to evaluate the diagnostic yield from prior genetic testing in a 20-year cohort of pediatric patients with congenital cataracts. A retrospective review of patients with congenital cataracts who underwent genetic testing was completed from 2003–2022. The diagnostic yield of the test was determined by variant classification and inheritance pattern. Variants from initial testing underwent reclassification in accordance with ACMG-AMP (American College of Medical Genetics and Genomics—American Association of Molecular Pathology) 2015 or 2020 ACMG CNV guidelines. A total of 95 variants were identified in 52 patients with congenital cataracts (42 bilateral, 10 unilateral); 42 % were White, 37% were Hispanic, 8% were Black, and 6% were Asian. The majority of patients (92%) did not have a family history of congenital cataracts but did have systemic illnesses (77%). Whole exome sequencing and targeted congenital cataract panels showed diagnostic yields of 46.2% and 37.5%, respectively. Microarray had the lowest yield at 11%. Compared to the initial classification, 16% (15 of 92 variants) had discrepant reclassifications. More testing is needed, and an increased focus is warranted in the field of ocular genetics on congenital cataracts, particularly in those with systemic illnesses and no family history, to advance our knowledge of this potentially blinding condition.

Original languageEnglish (US)
Article number608
JournalGenes
Volume14
Issue number3
DOIs
StatePublished - Mar 2023

Funding

This research was supported by a 2021 internal Lurie Family Practice Plan grant from Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611 USA and an unrestricted departmental grant from Research to Prevent Blindness.

Keywords

  • congenital cataract
  • diagnostic yield
  • variant reclassification

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics

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