Fig. 2.

A 43-year-old patient with an asymptomatic petroclival meningioma involving the upper and middle clivus. A posterior petrosectomy was performed without labyrinthectomy due to preoperative hearing preservation. ( A ) Gadolinium-enhanced T1-weighted MRI showing the tumor. ( B ) Venous MR angiography showing posterior insertion of the vein of Labbé in the superior petrosal sinus, not contraindicating complete petrosal approach. ( C ) Gadolinium-enhanced T1-weighted MRI 3 months after surgery showing Simpson III tumor resection, as expected through intraoperative view. ( D ) Mastoid reconstruction. The patient had no postoperative deficits and showed no recurrence 6 years after surgery. MR, magnetic resonance; MRI, magnetic resonance imaging.