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 (276900) have congenital severe to profound hearing loss and vestibular dysfunction.;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the protocadherin 15 gene (PCDH15, 605514.0001);