Paget's disease and sensori-neural deafness: temporal bone histopathology of Paget's disease.

Four cases with Paget's disease of the temporal bone are presented to illustrate the pathogenesis of the associated deafness. One case illustrates the combination of severe deafness due to bilateral otosclerosis with probably asymptomatic bilateral Paget's disease. One case with advanced Paget's disease presents features to explain early stages of sensori-neural deafness before actual cellular invasion of the inner ear. One case of profound deafness due to Paget's disease presents a different stage of cellular invasion of the inner ear by the disease on each side. One case illustrates invasion of the internal auditory meatus by Paget's disease with infiltration of the acoustic division of the nerve and profound deafness.