Alternative titles and symbols : Usher syndrome, type I, acadian variety;
Description : Usher syndrome constitutes a group of autosomal recessive disorders characterized
by progressive pigmentary retinopathy and sensorineural hearing loss. Phenotypic distinctions
are based on auditory and vestibular differences. Persons with forms of Usher syndrome
type I (see 276900) have congenital severe to profound hearing loss and vestibular
dysfunction.;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the USH1 protein network component harmonin gene (USH1C, 605242.0001);