Slc12a2-Related Autosomal Dominant Infantile-Developmental Delay-Intellectual Disability-Sensorineural Deafness Syndrome An important gene associated with Slc12a2-Related Autosomal Dominant Infantile-Developmental Delay-Intellectual Disability-Sensorineural Deafness Syndrome is SLC12A2 (Solute Carrier Family 12 Member 2).