AUTHOR=Zhu Yuying , Wu Ke , Jiang Cuicui , Zhu Qiumin TITLE=Lessons from a phenotypically normal infant with uniparental isodisomy of chromosome 21: a Case Report and review JOURNAL=Frontiers in Genetics VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2025.1544565 DOI=10.3389/fgene.2025.1544565 ISSN=1664-8021