question: Which key gene is involved in interstitial 6q25 microdeletion syndrome?
answer: Interstitial deletions of the long arm of chromosome 6 are rare. Clinically, these deletions are considered to be part of a unique microdeletion syndrome associated with intellectual disability and speech impairment, typical dysmorphic features, structural anomalies of the brain, microcephaly, and non-specific multiple organ anomalies. ARID1B is the key gene behind 6q microdeletion syndrome.