canal wall down

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Mastoid Cavity
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Mastoid Cavity

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5

The widened conchal bowl is the result of an old fashioned "canal wall down" mastoidectomy. The wide opening is important for both ventilation of the mastoid cavity and access to it for cleansing...

Interior of Right Mastoid Cavity
5

Interior of Right Mastoid Cavity

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This is a traditional "canal wall down" mastoid cavity of the right ear. The tympanic membrane can be seen in the 3 o'clock position. The remnant of the inferior portion of the posterior external...

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