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British Journal of Radiology (1975) 48, 170-175
© 1975 British Institute of Radiology
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The British Journal of Radiology, Vol 48, Issue 567 170-175, Copyright © 1975 by British Institute of Radiology

ARTICLES

Tomography of the petrous bone in keratosis obturans

SB Lauundoye, FD Martinson and AA Fajemisin

Three cases of keratosis obturans, which were studied by tomography of the petrous temporal bone, are described. The widening of the deep bony part of the external auditory canal by pressure erosion of an impacted benign slowly-growing mass is the key radiological finding. Erosion was so severe as to involve the facial nerve canal in one and the temporo-madibular joint in two cases. The theories of causation are reviewed. Tomography using elliptical tube movement was valuable in diagnosis, pre- and post-operative management.




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