{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T11:22:48Z","timestamp":1792149768448,"version":"4.4.0"},"reference-count":31,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,3,14]],"date-time":"2025-03-14T00:00:00Z","timestamp":1741910400000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Molec Gen &amp;amp; Gen Med"],"published-print":{"date-parts":[[2025,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Uniparental disomy (UPD) is a specific type of chromosomal variation in which both chromosomes of a homologous pair are inherited from the same parent. It is responsible for a wide range of disorders. Monosomy rescue and trisomy rescue are the two main hypotheses of UPD generation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>An older parturient woman with a positive noninvasive prenatal screening (NIPS) test but a negative prenatal diagnosis was referred to the hospital. Trio whole exome sequencing (trio\u2010WES) and ddPCR were further performed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Utilizing Trio\u2010WES analysis, our research identified a maternal segmental UPD on chromosome 16, characterized by isodisomic genomic segments at the ends of the chromosome arms and heterodisomic genomic segments near the centromere. Moreover, several nuanced signs pointing to the paternal chromosome 16 were discovered, suggesting a low level of trisomy 16 mosaicism. A homozygous missense mutation (c.1499C&gt;T; p.Ala500Val) was also detected in the fetal <jats:italic>TBC1D24<\/jats:italic> gene, passed down from the heterozygous carrier mother. Furthermore, ddPCR analysis verified a 3% mosaic level of trisomy 16.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>We have quantitatively verified for the first time a combination of trisomy 16 mosaicism and maternal segmental UPD 16 due to incomplete trisomy rescue, illuminating the cause of the mismatch between positive NIPS and negative prenatal diagnoses.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mgg3.70091","type":"journal-article","created":{"date-parts":[[2025,3,14]],"date-time":"2025-03-14T12:34:19Z","timestamp":1741955659000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Incomplete Trisomy Rescue Reveals the Mechanism Underlying Discordance Between Noninvasive Prenatal Screening and Prenatal Diagnosis"],"prefix":"10.1002","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8754-3221","authenticated-orcid":false,"given":"Yanan","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Genetics and Prenatal Diagnosis Luoyang Maternal and Child Health Hospital  Luoyang People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Zhou","sequence":"additional","affiliation":[{"name":"Puluo (Wuhan) Medical Biotechnology Co. Ltd  Wuhan People's Republic of China"},{"name":"Department of Marketing Wuhan Kindstar Clinical Diagnostic Institute Co. Ltd  Wuhan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuqiong","family":"Chai","sequence":"additional","affiliation":[{"name":"Department of Genetics and Prenatal Diagnosis Luoyang Maternal and Child Health Hospital  Luoyang People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weiwei","family":"Zang","sequence":"additional","affiliation":[{"name":"Department of Genetics and Prenatal Diagnosis Luoyang Maternal and Child Health Hospital  Luoyang People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongchao","family":"Wang","sequence":"additional","affiliation":[{"name":"Imaging Department of Luoyang Maternal and Child Health Hospital  Luoyang Henan Province China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fan","family":"Yin","sequence":"additional","affiliation":[{"name":"Puluo (Wuhan) Medical Biotechnology Co. 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