Deafness, Autosomal Dominant 2a, also known as dfna2a, is related to dfna2 nonsyndromic hearing loss and sensorineural hearing loss. An important gene associated with Deafness, Autosomal Dominant 2a is KCNQ4 (Potassium Voltage-Gated Channel Subfamily Q Member 4), and among its related pathways/superpathways are Dopamine-DARPP32 Feedback onto cAMP Pathway and Sensory processing of sound. Affiliated tissues include brain, and related phenotypes are nervous system and hearing/vestibular/ear