Double trisomy (XXX+21 karyotype) in a six-year-old girl with down phenotype

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We describe a case of a six-year-old girl who presents multiple dysmorphic features characteristic of Down’s syndrome.
She has a significant general developmental delay, with a score that correspond to 32 months of developmental age. This delay is
especially in language, with a very scant vocabulary. She communicates with some hand sign words or pointing, although her auditory
responses in hearing test were normal. Two previous karyotype studies showed 48, XXX, +21 anomalies. This double trisomy is a
rare condition described in isolated cases in the literature and none of these refers to the developmental aspects of these children
(Balwan et al. 2008; Li et al. 2004; Park et al. 1995; Day et al. 1963).
Translated title of the contributionTrisomía doble (Kariotipo XXX+21) en una niña de 6 años con fenotipo Down
Original languageEnglish (US)
Pages (from-to)337-340
Number of pages4
JournalJournal of Genetics
Issue number2
StatePublished - Mar 19 2018

All Science Journal Classification (ASJC) codes

  • Genetics


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