{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T20:41:51Z","timestamp":1781037711034,"version":"3.54.1"},"reference-count":41,"publisher":"Wiley","issue":"13","license":[{"start":{"date-parts":[[2022,11,30]],"date-time":"2022-11-30T00:00:00Z","timestamp":1669766400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Prenatal Diagnosis"],"published-print":{"date-parts":[[2022,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To establish the positive predictive values (PPV) of cfDNA testing based on data from a nationwide survey of independent clinical cytogenetics laboratories.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Prenatal diagnostic test results obtained by Italian laboratories between 2013 and March 2020 were compiled for women with positive non\u2010invasive prenatal tests (NIPT), without an NIPT result, and cases where there was sex discordancy between the NIPT and ultrasound. PPV and other summary data were reviewed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Diagnostic test results were collected for 1327 women with a positive NIPT. The highest PPVs were for Trisomy (T) 21 (624\/671, 93%) and XYY (26\/27, 96.3%), while rare autosomal trisomies (9\/47, 19.1%) and recurrent microdeletions (8\/55, 14.5%) had the lowest PPVs. PPVs for T21, T18, and T13 were significantly higher when diagnostic confirmation was carried out on chorionic villi (97.5%) compared to amniotic fluid (89.5%) (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a00.001). In 19\/139 (13.9%), of no result cases, a cytogenetic abnormality was detected. Follow\u2010up genetic testing provided explanations for 3\/6 cases with a fetal sex discordancy between NIPT and ultrasound.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>NIPT PPVs differ across the conditions screened and the tissues studied in diagnostic testing. This variability, issues associated with fetal sex discordancy, and no results, illustrate the importance of pre\u2010 and post\u2010test counselling.<\/jats:p><\/jats:sec>","DOI":"10.1002\/pd.6271","type":"journal-article","created":{"date-parts":[[2022,11,20]],"date-time":"2022-11-20T07:49:20Z","timestamp":1668930560000},"page":"1575-1586","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Positive predictive values and outcomes for uninformative cell\u2010free DNA tests: An Italian multicentric Cytogenetic and cytogenomic Audit of diagnOstic testing (ICARO study)"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3836-5190","authenticated-orcid":false,"given":"Francesca Romana","family":"Grati","sequence":"first","affiliation":[{"name":"R&amp;D, Cytogenetics Molecular Genetics and Medical Genetics Unit TOMA Advanced Biomedical Assays S.p.A  Busto Arsizio Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ilaria","family":"Bestetti","sequence":"additional","affiliation":[{"name":"Laboratorio di Genetica Medica Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico  Milano Italy"},{"name":"Department of Medical Biotechnology and Translational Medicine Universit\u00e0 degli Studi di Milano  Milan Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daria","family":"De Siero","sequence":"additional","affiliation":[{"name":"R&amp;D, Cytogenetics Molecular Genetics and Medical Genetics Unit TOMA Advanced Biomedical Assays S.p.A  Busto Arsizio Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesca","family":"Malvestiti","sequence":"additional","affiliation":[{"name":"R&amp;D, Cytogenetics Molecular Genetics and Medical Genetics Unit TOMA Advanced Biomedical Assays S.p.A  Busto Arsizio Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicoletta","family":"Villa","sequence":"additional","affiliation":[{"name":"UOS Citogenetica e Genetica Medica \u2013 ASST\u2010Monza Ospedale San Gerardo Universit\u00e0 di Milano\u2010Bicocca  Monza Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elena","family":"Sala","sequence":"additional","affiliation":[{"name":"UOS Citogenetica e Genetica Medica \u2013 ASST\u2010Monza Ospedale San Gerardo Universit\u00e0 di Milano\u2010Bicocca  Monza Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesca","family":"Crosti","sequence":"additional","affiliation":[{"name":"UOS Citogenetica e Genetica Medica \u2013 ASST\u2010Monza Ospedale San Gerardo Universit\u00e0 di Milano\u2010Bicocca  Monza Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valentina","family":"Parisi","sequence":"additional","affiliation":[{"name":"U.O.C. 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