Deafness, Autosomal Recessive 23, also known as dfnb23, is related to usher syndrome, type if and deafness, autosomal recessive 1a. An important gene associated with Deafness, Autosomal Recessive 23 is PCDH15 (Protocadherin Related 15), and among its related pathways/superpathways are Olfactory Signaling Pathway and Sensory processing of sound. Affiliated tissues include brain and eye, and related phenotypes are sensorineural hearing impairment and visual impairment