Retinitis Pigmentosa-Deafness Syndrome, also known as retinitis pigmentosa 21, formerly, is related to usher syndrome and retinitis pigmentosa, deafness, mental retardation, and hypogonadism, and has symptoms including coughing, snoring and tinnitus. An important gene associated with Retinitis Pigmentosa-Deafness Syndrome is MT-TS2 (Mitochondrially Encoded TRNA-Ser (AGU/C) 2). The drug Omega 3 Fatty Acid has been mentioned in the context of this disorder. Affiliated tissues include retina, and related phenotype is hearing/vestibular/ear.