Endoscopic Marsupialization With Periodic Debridement for Petrous Apex Cholesteatoma.
Emily G Hardy, Michael A Cirelli, Nitish Kumar et al.
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From the abstract
In cases where an expanded cholesteatoma has extensively eroded the petroclival bones, marsupialization of the cholesteatoma cavity without matrix removal through an endoscopic transsphenoidal approach is a feasible and safe option.