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James K. Liu, Christina M. Sayama, Clough Shelton and Joel D. MacDonald

was counseled regarding the various treatment options, including conservative therapy, stereotactic radiosurgery, and microsurgical resection, and elected to undergo microsurgical resection. A suboccipital craniectomy was performed, and the tumor was removed via a retrosigmoid approach with the intention of preserving hearing. Facial nerve and brainstem auditory evoked response monitoring were used. During surgery, the tumor was seen emanating from the porus acusticus, which was distorting the eighth cranial nerve. The posterior meatus of the IAC was drilled to