{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,9,10]],"date-time":"2024-09-10T21:11:54Z","timestamp":1726002714899},"reference-count":41,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2005,5,16]],"date-time":"2005-05-16T00:00:00Z","timestamp":1116201600000},"content-version":"vor","delay-in-days":3745,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am. J. Med. Genet."],"published-print":{"date-parts":[[1995,2,13]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>With improvements in culturing and banding techniques, amniotic fluid studies now achieve a level of resolution at which the Prader\u2010Willi syndrome (PWS) and Angelman syndrome (AS) region may be questioned. Chromosome 15 heteromorphisms, detected with Q\u2010 and R\u2010banding and used in conjunction with PWS\/AS region\u2010specific probes, can confirm a chromosome deletion and establish origin to predict the clinical outcome.<\/jats:p><jats:p>We report four de novo cases of an abnormal\u2010appearing chromosome 15 in amniotic fluid samples referred for advanced maternal age or a history of a previous chromosomally abnormal child. The chromosomes were characterized using G\u2010, Q\u2010, and R\u2010banding, as well as isotopic and fluorescent <jats:italic>in situ<\/jats:italic> hybridization of DNA probes specific for the proximal chromosome 15 long arm.<\/jats:p><jats:p>In two cases, one chromosome 15 homolog showed a consistent deletion of the ONCORPWS\/AS region A and B. In the other two cases, one of which involved an inversion with one breakpoint in the PWS\/AS region, all of the proximal chromosome 15 long arm DNA probes used in the in situ hybridization were present on both homologs. Clinical follow\u2010up was not available on these samples, as in all cases the parents chose to terminate the pregnancies.<\/jats:p><jats:p>These cases demonstrate the ability to prenatally diagnose chromosome 15 abnormalities associated with PWS\/AS. In addition, they highlight the need for a better understanding of this region for accurate prenatal diagnosis. \u00a9 1995 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ajmg.1320550411","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T17:54:26Z","timestamp":1118512466000},"page":"444-452","source":"Crossref","is-referenced-by-count":6,"title":["Prenatal diagnosis of chromosome 15 abnormalities in the Prader\u2010Willi\/Angelman syndrome region by traditional and molecular cytogenetics"],"prefix":"10.1002","volume":"55","author":[{"given":"SuEllen","family":"Toth\u2010Fejel","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R. 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