De novo interstitial long arm deletion of chromosome 3 with facial dysmorphism, Dandy-Walker variant malformation and hydrocephalus.

We report an 8-year-old girl with coarse facial features, macrocrania and developmental delay. Cranial anomalies in the form of hydrocephalus and Dandy-Walker (DW) variant malformation were detected on neuro-imaging. Karyotyping revealed a de novo interstitial deletion of bands 3q25.1 to 3q25.33. Deletion of the 3q24-q26 region appears to be associated with a somewhat similar constellation of findings of craniofacial dysmorphism (broad and depressed nasal bridge and low set posteriorly rotated ears), mental retardation, congenital heart defects, and central nervous system malformations.