Prenatally diagnosed submicroscopic familial aberrations at 18p11.32 without phenotypic effect.
Mol Cytogenet 2011;
4:27. [PMID:
22136596 PMCID:
PMC3287247 DOI:
10.1186/1755-8166-4-27]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 12/02/2011] [Indexed: 11/21/2022] Open
Abstract
Background
Recent development of MLPA (Multiplex-Ligation-dependent Probe Amplification, MRC-Holland) and microarray technology allows detection of a wide range of new submicroscopic abnormalities. Publishing new cases and case reviews associated with both clinical abnormalities and a normal phenotype is of great value.
Findings/results
We report on two phenotypically normal foetuses carrying a maternally-inherited interstitial submicroscopic abnormality of chromosome 18p11.32. Both abnormalities were found with the aneuploidy MLPA kit P095 during rapid aneuploidy detection, which was offered along with conventional karyotyping. Foetus 1 and its mother have a 1,7 Mb deletion and foetus 2 and its mother have a 1,9 Mb duplication. In both cases normal babies were born. We used the HumanCytoSNP-12 array of Illumina to visualize the CNVs and map the breakpoints.
Conclusions
We suggest that a CNV at 18p11.32 (528,050-2,337,486) may represent a new benign euchromatic variant.
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