Cholesteatoma Attic Retraction Pocket

Operative facial nerve damage occurred in one case. This retraction pocket becomes later filled with desquamated epithelial debris which forms a nidus for the infection to occur later. The erosion often goes on as the ball of epithelium grows to surround the ossicles and may extend into the mastoid bone the lateral semicircular canal the middle cranial fossa and the posterior cranial fossa.

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