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Hi, thanks for your feedback, we’re glad that you found the video to be useful! The Middle fossa craniotomy would involve creating a small craniotomy the inferior limit of which would be the temporal line (a horizontal line continuing posteriorly from the root of the zygoma). The middle cranial fossa would be entered, without breaching the dura. The temporal lobe would be gently retracted enabling the surgeon to follow the floor of the middle cranial fossa until they come onto the dehiscent superior semicircular canal. This would then be resurfaced in a similar way to the transmastoid approach described above.