Ozler S, Ersoy AO, Oztas E, Topcu V, Celen S, Danisman N. The unprecedented recurrent diploid/tetraploid mosaicism of trisomy-18 (mixoploidy; 4n+18/2n+18): clinical report.
Am J Med Genet A 2015;
167:1650-3. [PMID:
25851783 DOI:
10.1002/ajmg.a.37062]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 02/11/2015] [Indexed: 11/10/2022]
Abstract
We report on a 32-year-old woman who presented at gestational age of 14 weeks. During ultrasonographic examination, we discovered that her fetus had several important abnormalities, including a cystic hygroma, craniofacial defects (low-set ears, broad nose), heart defects (single atrium, single ventricle), agenesis of corpus callosum, limb defects (clenched hands, pes equinovarus). Chorionic villus sampling and karyotyping revealed diploid/tetraploid mosaicism with trisomy 18 (mixoploidy; 4n+18/2n+18). Her second pregnancy was terminated because of the same clinical manifestations 1 year prior. Her first pregnancy resulted in the birth of an entirely healthy boy. As far as know, no other similar case has been presented in the literature.
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