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A newly described syndrome associated with facial dysmorphism, progressive growth restriction, severe intellectual deficit and absent or severely delayed speech. It has been reported in nine unrelated patients. The most common facial feature includes high or broad forehead, hypertelorism and short philtrum. Short hands and feet are frequently observed. The microdeletion critical region encompasses two candidate genes, PRKG2 and RASGEF1B, in which haploinsufficiency could participate to the phenotype.
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