Meningioma originating from the superior petrosal vein without dural attachment: A case report

Figure 2 Intraoperative microscopic and schematic images. A: The tumor was firmly adherent to the superior petrosal vein without dural attachment to the tentorium or petrous pyramid; B: The origin site was cauterized and resected to completely remove the tumor; C: The simplified schematic image of the intraoperative microscopic image A; D: The simplified schematic image of the intraoperative microscopic image B. Arrow: Origin site; T: Tumor; SPV: Superior petrosal vein; V: Trigeminal nerve; VI: Abducens nerve; VII-VIII: Facial-vestibulocochlear nerve complex.