Obliteration of the endolymphatic sac and the cochlear aqueduct.
D003052:Cochlear Aqueduct; D007758:Ear, Inner / Q000502:physiology*; D004712:Endolymphatic Sac; D006309:Hearing / Q000502:physiology*; D006320:Hearing Tests; D006801:Humans
HEARING/physiology; LABYRINTH/physiology