Deafness, Autosomal Dominant 20, also known as dfna20, is related to baraitser-winter syndrome 2 and nonsyndromic hearing loss. An important gene associated with Deafness, Autosomal Dominant 20 is ACTG1 (Actin Gamma 1), and among its related pathways/superpathways is Sensory processing of sound. Affiliated tissues include brain and endothelial, and related phenotypes are bilateral sensorineural hearing impairment and progressive sensorineural hearing impairment