{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,13]],"date-time":"2026-06-13T06:48:30Z","timestamp":1781333310188,"version":"3.54.1"},"reference-count":33,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2015,7,29]],"date-time":"2015-07-29T00:00:00Z","timestamp":1438128000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American J of Med Genetics Pt A"],"published-print":{"date-parts":[[2015,10]]},"abstract":"<jats:sec><jats:label\/><jats:p>We report on a 6\u2010month\u2010old girl with two apparent cell lines; one with trisomy 21, and the other with paternal genome\u2010wide uniparental isodisomy (GWUPiD), identified using single nucleotide polymorphism (SNP) based microarray and microsatellite analysis of polymorphic loci. The patient has Beckwith\u2010Wiedemann syndrome (BWS) due to paternal uniparental disomy (UPD) at chromosome location 11p15 (UPD 11p15), which was confirmed through methylation analysis. Hyperinsulinemic hypoglycemia is present, which is associated with paternal UPD 11p15.5; and she likely has medullary nephrocalcinosis, which is associated with paternal UPD 20, although this was not biochemically confirmed. Angelman syndrome (AS) analysis was negative but this testing is not completely informative; she has no specific features of AS. Clinical features of this patient include: dysmorphic features consistent with trisomy 21, tetralogy of Fallot, hemihypertrophy, swirled skin hyperpigmentation, hepatoblastoma, and Wilms tumor. Her karyotype is 47,XX,+21[19]\/46,XX[4], and microarray results suggest that the cell line with trisomy 21 is biparentally inherited and represents 40\u201050% of the genomic material in the tested specimen. The difference in the level of cytogenetically detected mosaicism versus the level of mosaicism observed via microarray analysis is likely caused by differences in the test methodologies. While a handful of cases of mosaic paternal GWUPiD have been reported, this patient is the only reported case that also involves trisomy 21. Other GWUPiD patients have presented with features associated with multiple imprinted regions, as does our patient. \u00a9 2015 Wiley Periodicals, Inc.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ajmg.a.37187","type":"journal-article","created":{"date-parts":[[2015,7,29]],"date-time":"2015-07-29T05:22:13Z","timestamp":1438147333000},"page":"2463-2469","source":"Crossref","is-referenced-by-count":18,"title":["Mosaic paternal genome\u2010wide uniparental isodisomy with down syndrome"],"prefix":"10.1002","volume":"167","author":[{"given":"Diana","family":"Darcy","sequence":"first","affiliation":[{"name":"Silicon Valley Genetics Center Santa Clara Valley Medical Center San Jose California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paldeep Singh","family":"Atwal","sequence":"additional","affiliation":[{"name":"Stanford University Medical Center Palo Alto 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