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  • Title: Tomography of the petrous bone in keratosis obturans.
    Author: Lauundoye SB, Martinson FD, Fajemisin AA.
    Journal: Br J Radiol; 1975 Mar; 48(567):170-5. PubMed ID: 1125544.
    Abstract:
    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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