A recently described syndrome with characteristics of developmental delay, facial dysmorphism and hearing loss. It has been diagnosed in 4 patients. All of them presented with microcephaly, developmental delay, dysmorphic features and hearing loss, two of them had agenesis of the corpus callosum. Dysmorphic features include midface hypoplasia, hypertelorism, broad nasal root and posteriorly rotated ears.This syndrome is caused by an interstitial deletion encompassing 6q25.2-q25.3. These de novo deletions have a variable size with the smallest region of overlap of 3.52 Mb. [from SNOMEDCT_US]