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The objective of this study was to review prenatally-reported cases of tetrasomy 9p thus far and to identify ultrasound phenotypes that may be suggestive of this specific syndrome. A PubMed database search was done in February 2018 without any restriction of publication date orjournals, with the use of the following keywords: tetrasomy 9p, tetrasomy 9p prenatal, mosaic tetrasomy 9p, mosaic tetrasomy 9p prenatal, isochromosome 9p, duplication 9p prenatal, trisomy 9p prenatal. Reported cases were included if the clinical presentation and diagnostic approach of each case was clearly described. The most common characteristics of prenatally-detected tetrasomy 9p are intrauterine growth retardation (IUGR, 57.0%), central nervous system (CNS) abnormalities (59.0%), skeletal anomalies (29.0%), genitourinary and renal anomalies (29.0%) and cardiac defects (29.0%). The phenotypic spectrum of tetrasomy 9p is rather unspecific as these findings are commonly associated with other chromosome anomalies, as well as microdeletion\/microduplication or monogenic syndromes. The combination of early fetal morphology and diagnostic genetic testing enables a definite tetrasomy 9p diagnosis and effective further pregnancy management.<\/jats:p>","DOI":"10.2478\/bjmg-2019-0012","type":"journal-article","created":{"date-parts":[[2019,8,28]],"date-time":"2019-08-28T05:04:26Z","timestamp":1566968666000},"page":"11-20","source":"Crossref","is-referenced-by-count":9,"title":["A systematic clinical review of prenatally diagnosed tetrasomy 9p"],"prefix":"10.2478","volume":"22","author":[{"given":"M","family":"Vink\u0161el","sequence":"first","affiliation":[{"name":"Clinical Institute of Medical Genetics, University Medical Centre Ljubljana , Ljubljana , Slovenia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M","family":"Volk","sequence":"additional","affiliation":[{"name":"Clinical Institute of Medical Genetics, University Medical Centre Ljubljana , Ljubljana , Slovenia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B","family":"Peterlin","sequence":"additional","affiliation":[{"name":"Clinical Institute of Medical Genetics, University Medical Centre Ljubljana , Ljubljana , Slovenia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L","family":"Lovrecic","sequence":"additional","affiliation":[{"name":"Clinical Institute of Medical Genetics, University Medical Centre Ljubljana , Ljubljana , Slovenia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","published-online":{"date-parts":[[2019,8,28]]},"reference":[{"key":"2026042716351704921_j_bjmg-2019-0012_ref_001_w2aab3b7c11b1b6b1ab1b5b1Aa","doi-asserted-by":"crossref","unstructured":"Dutly F, Balmer D, Baumer A, Binkert F, Schinzel A. 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