Trans-cochlear approach
to Lt. petroclival tumor:
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Tympanic membrane and ossicles are removed.
Mastoidectomy is done; the sigmoid sinus, and the mastoid segment of the facial nerve are skeletonized.
Labyrinthectomy is in progress; Tympanic segment, and labyrinthine segment of the facial nerve are skeletonized.
IAM is deroofed.
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.
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