exostosis

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Small Solitary Exostosis of the External Ear Canal
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Small Solitary Exostosis of the External Ear...

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Exostoses of the bony ear canal are the result of localized areas of benign bony hypertrophy, which are thought to result from stimulation of the periosteum covering the medial surface of the tympanic...

Massive Exostoses
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Massive Exostoses

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This patient's tympanic bone has developed massive exostoses which almost completely occlude the external auditory canal.

Histology of Exostosis
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Histology of Exostosis

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Exostoses originate from the tympanic bone and are believed to occur as the result of frequent exposure to cold water in early life. Histologically they consist of a dense lamellar bone which on section...

Large Exostosis
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Large Exostosis

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There is a large solitary exostosis seen in the 12 o'clock position of the deep bony canal of this right ear.

Multiple Exostoses
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Multiple Exostoses

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This tympanic bone has developed multiple exostoses significantly narrowing the external auditory canal. As long as there is an air passage through the external auditory canal, exostoses do not appear...

Solitary Exostosis
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Solitary Exostosis

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There is a solitary exostosis seen in the 12 o'clock position of the deep external auditory canal of this left ear.

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