Usher Syndrome Type 2 A syndrome characterized by congenital, bilateral sensorineural hearing loss that is mild to moderate in the low frequencies and severe to profound in the higher frequencies, no abnormalities in the vestibular system, and retinitis pigmentosa. Cellosaurus Disease or Syndrome C126328 Usher Syndrome Type 2 C0339534 Usher Syndrome Type 2 Cellosaurus Disease Terminology USH2A Gene PDZD7 Gene ADGRV1 Gene Usher Syndrome