TOMOGRAPHY OF THE TEMPORAL BONE IN PAGET'S DISEASE

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Abstract
Polytomographic examination of the temporal bone in 21 patients with Paget's disease of the skull has demonstrated roentgenographic changes in all patients examined, ranging from minimal demineralization of the petrous apex to demineralization of the entire petrous pyramid. Twenty-nine of the 42 temporal bones examined had partial or complete demineralization of the cochlea and 24 had changes in the remainder of the otic capsule. In addition, marginal or complete thickening of the footplate of the stapes was present in 12 of the ears examined. Audiometric studies indicate that sensori-neural deafness is most common. However, a significant number of patients have a low frequency conductive hearing loss. The presence of a sensori-neural hearing loss can he predicted in most cases from the tomographic examination. However, two-thirds of the patients with conductive deafness had no roentgenographic changes in the middle ear. The tomographic findings bear no relationship to the presence or absence of vestibular symptoms. Differentiation from labyrinthine otosclerosis should pose no problem when changes are present in areas other than the otic capsule.

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