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A rare chromosomal anomaly syndrome resulting from the partial duplication of the long arm of chromosome 7. The disorder has a highly variable phenotype that typically manifests with mild to moderate intellectual delay (patients could be in the normal range), speech (particularly expressive language disorders) and distinctive craniofacial features (brachycephaly, broad forehead, straight eyebrows, broad nasal tip, short philtrum, thin upper lip and facial asymmetry). Hypotonia, developmental coordination disorders and various congenital anomalies, such as heart defects, diaphragmatic hernia, renal malformations and cryptorchidism, are frequently presented. Neurological abnormalities (visible on MRI) have been reported.
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