The recessive families were included as several hearing impairment genes (e. g. TMC1 [OMIM 606706], TECTA [OMIM 602574], MYO7A [OMIM 276903]) have been found to underlie both autosomal-dominant and recessive NSHI (http://hereditaryhearingloss.org/). The gene discussed is TMC1; the disease is Hearing impairment.