Dr

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	Clip1: Tympanic membrane and ossicles are removed. Mastoidectomy is done; the sigmoid sinus, and the mastoid segment of the facial nerve are skeletonized.

	Clip2: Labyrinthectomy is in progress; Tympanic segment, and labyrinthine segment of the facial nerve are skeletonized. IAM is deroofed.

	Clip3: GSPN is cut and the facial nerve is rerouted posteriorly. Cohlea, petrous apex, & clivus are drilled out. Tumor is seen after transsigmoid incision the dura. After tumor excision, brainstem, and basilar artery are visualized.