Deafness, Autosomal Recessive 21, also known as dfnb21, is related to deafness, autosomal recessive 42 and deafness, autosomal recessive 24. An important gene associated with Deafness, Autosomal Recessive 21 is TECTA (Tectorin Alpha), and among its related pathways/superpathways are Olfactory Signaling Pathway and Sensory processing of sound. Affiliated tissues include brain, and related phenotypes are sensorineural hearing impairment and nervous system