| A recently described syndrome characterized by developmental delay, microcephaly, epilepsy, short stature, facial dysmorphism and behavioral problems. Facial features include down-slanting palpebral fissures, short nose, low-set ears, wide mouth and thin upper lip. Variable congenital anomalies can also be observed. This syndrome is caused by an interstitial deletion encompassing 16p13.11. The underlying mechanism is non-allelic homologous recombination. Microdeletions appear de novo or are inherited from mildly affected or completely normal parents in an autosomal dominant manner, suggesting that the microdeletion has incomplete penetrance and variable expressivity. |
