RESUMO
La microduplicación 3q29 (MIM 611936) es un raro síndrome caracterizado por retraso mental moderado, rasgos dismórficos craneofaciales y anomalías musculoesqueléticas. La región mínima crítica tiene un tamaño de aproximadamente 1,73Mb, está flanqueada por secuencias repetitivas y es similar en tamaño a la microdeleción recíproca 3q29, sugiriendo para ambas una recombinación homóloga no alélica (NAHR) entre las secuencias repetitivas como mecanismo de producción. Describimos una nueva familia con diferente expresividad clínica en la paciente y su madre (AU)
3q29 microduplication (MIM 611936) is rare syndrome characterized by moderate mental retardation, craniofacial dysmorphic features and musculoskeletal anomalies. The size of the minimal critical region is about 1.73Mb. It is flanked by repetitive sequences and it is similar in size to the reciprocal 3q29 microdeletion, suggesting a non-allelic homologous recombination event (NAHR) at flanking LCR sequences as its aetiological mechanism. We describe a new familial case with variable expressivity (AU)
Assuntos
Humanos , Feminino , Criança , Duplicação Cromossômica , Deficiência Intelectual/genética , Anormalidades Musculoesqueléticas/genética , Anormalidades Craniofaciais/genética , Sequências Repetitivas de Ácido Nucleico/genéticaRESUMO
3q29 microduplication (MIM 611936) is rare syndrome characterized by moderate mental retardation, craniofacial dysmorphic features and musculoskeletal anomalies. The size of the minimal critical region is about 1.73 Mb. It is flanked by repetitive sequences and it is similar in size to the reciprocal 3q29 microdeletion, suggesting a non-allelic homologous recombination event (NAHR) at flanking LCR sequences as its aetiological mechanism. We describe a new familial case with variable expressivity.
