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Deleção cromossómica intersticial em 14q “de novo”: apresentação de um caso
Ribeiro, M.C.; Mota Freitas, M.; Ribeiro, J.; Lopes, M.M.; Oliva Teles, N.; Correia, H.; Fonseca e Silva, M.L.Introdução: As deleções intersticiais são anomalias cromossómicas estruturais, desequilibradas, resultantes de dois pontos de quebra, frequentemente associadas a quadros clínicos anormais devido à perda de material genético ativo (eucromatina). As consequências fenotípicas dependem do segmento cromossómico perdido e do número de genes aí localizados. Material e Métodos: Os autores apresentam o caso de um indiv...
Identification of a mosaic non-inherited small supernumerary ring chromosome 2:...
Oliveira, F.P.; Ribeiro, J.; Mota Freitas, M.; Oliva Teles, N.; Bártolo, A.; Correia, H.; Fonseca e Silva, M.L.Introduction: The identification of supernumerary marker chromosomes (SMCs) derived from all the autosomes is currently possible, but rarely by conventional cytogenetics alone. Supernumerary ring chromosomes (SRCs) account for about 10% of these cases. SRCs derived from chromosome 2 are unusual, and there are only a few cases reported in the literature. The severity of the phenotype depends on the type of the m...
Interstitial deletion 15q21 and Prader-Willi like syndrome phenotype: Case report
Pires, S.; Oliva Teles, N.; Ribeiro, J.; Mota Freitas, M.; Marques, B.; Reis, G.; Correia, H.; Fonseca e Silva, M.L.Introduction: Chromosome 15q interstitial deletions not involving the Prader-Willi/Angelman region are uncommon and poorly characterized. Very few cases of different segmental losses involving the 15q21 region have been reported at cytogenetic level. All the described patients present with moderate to several mental retardation and characteristic facial dysmorphic features. Some authors compare the similarity b...
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