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Horizonte Médico (Lima)

Print version ISSN 1727-558X

Abstract

TALAVERA VARGAS-MACHUCA, Sergio et al. Molecular diagnosis of Smith-Magenis syndrome using MLPA (Multiplex Ligationdependent Probe Amplification). Horiz. Med. [online]. 2017, vol.17, n.3, pp.73-78. ISSN 1727-558X.  http://dx.doi.org/10.24265/horizmed.2017.v17n3.12.

Medical genetics is rapidly advancing thanks to technologies that accurately define which genes are involved in the development of diseases. Some syndromes occur in the general population, and their diagnosis and treatment are important to provide patients with an adequate care and prognosis. We present the case of a dysmorphic child who was born at 33 weeks of pregnancy by caesarean delivery due to preeclampsia. Cytogenetic analysis showed a heterozygous deletion on the short arm of chromosome 17 (46, XX, del 17p11.2). The diagnosis was complemented by MLPA analysis, which measures the presence/absence of certain genes defined in some syndromes, and confirmed the deletion of 2.1 megabases of DNA, including the RAS1 gene, responsible for the Smith-Magenis syndrome.

Keywords : Smith-Magenis; cytogenetics; MLPA.

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