| A recently described syndrome with characteristics of severe intellectual deficit, with a normal neonatal period, followed by a phase of regression at the age of 3-6 months. The phenotype includes other features: postnatal growth retardation and microcephaly, hypotonia, epilepsy, stereotypic movements and feeding problems. Dysmorphic features associate prominent metopic suture, bilateral epicanthic folds, bulbous nasal tip, tented upper lip, everted lower lip and large ears. This syndrome is caused by an interstitial deletion encompassing 14q12. They have a variable size and include FOXG1 as the gene responsible for the intellectual deficit and severe microcephaly. |
