Browsing by Author "Mascarenhas, A"
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- Copy number variants prioritization after array-CGH analysis - a cohort of 1000 patientsPublication . Carreira, IM; Ferreira, SI; Matoso, E; Pires, LM; Ferrão, J; Jardim, A; Mascarenhas, A; Pinto, M; Lavoura, N; Pais, C; Paiva, P; Simões, L; Caramelo, F; Ramos, L; Venâncio, M; Ramos, F; Beleza, A; Sá, J; Saraiva, J; Barbosa de Melo, JArray-based comparative genomic hybridization has been assumed to be the first genetic test offered to detect genomic imbalances in patients with unexplained intellectual disability with or without dysmorphisms, multiple congenital anomalies, learning difficulties and autism spectrum disorders. Our study contributes to the genotype/phenotype correlation with the delineation of laboratory criteria which help to classify the different copy number variants (CNVs) detected. We clustered our findings into five classes ranging from an imbalance detected in a microdeletion/duplication syndrome region (class I) to imbalances that had previously been reported in normal subjects in the Database of Genomic Variants (DGV) and thus considered common variants (class IV).
- Interstitial 287 kb deletion of 4p16.3 including FGFRL1 gene associated with language impairment and overgrowthPublication . Matoso, E; Ramos, F; Ferrão, J; Pires, LM; Mascarenhas, A; Melo, JB; Carreira, IMWe report a male patient with developmental delay carrying an interstitial 4p16.3 deletion of 287 kb, disclosed by oligo array-CGH and inherited from his father with a similar but milder phenotype. This deletion is distal to the Wolf-Hirschhorn syndrome critical regions, but includes the FGFRL1 gene proposed to be a plausible candidate for part of the craniofacial characteristics of Wolf-Hirschhorn syndrome patients. However, the proband lacks the typical facial appearance of the syndrome, but exhibits overgrowth, dysfunction of temporomandibular articulation and a bicuspid aortic valve. Given the pattern of expression of the fibroblast growth factor receptor-like 1 and its involvement in bone and cartilage formation as well as in heart valve morphogenesis, we discuss the impact of its haploinsufficiency in the phenotype.