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The Supra/Infra Transtentorial Transfalcine Approach for the Removal of a Falcotentorial Meningioma: 2-Dimensional Video.
Operative Neurosurgery (Hagerstown, Md.) 2019 June 2
Falcotentorial meningiomas originate in the junction of the falx cerebri and the tentorium. Due to its anatomic vicinity, these tumors have a close relationship with important neurovascular structures surrounding the pineal region including the deep venous system. Surgical approaches would normally consider posterior midline corridors, but decision between supra or infratentorial access should be considered by the size, anatomic displacement of structures, and the infiltration of the dural attachment. This surgical video1,2 demonstrates the surgical technique and pearls to achieve a stepwise resection of a complex falcotentorial meningioma. We present a case of a 42-yr-old female patient, neurologically intact at presentation. A semi-sitting position was used. Appropriate management of cerebrospinal fluid was obtained with an external ventricular drainage which is kept closed until the dura is opened. A suprainfratentorial craniotomy was done with adequate exposure of the superior sagittal sinus and torcula. The supracerebellar infratentorial corridor was used for inferior internal debulking and arachnoidal dissection of the tumor while the exposure obtained in the posterior interhemispheric allowed a corridor which exposed widely the tumor with transtentorial transfalcine extension. Adequate management of adjacent structures was done while preserving the straight sinus and vein of Galen. A gross total removal of the tumor was achieved and the patient was discharged without complications. After this surgical video, the viewer will have learned the steps to safely achieve a surgical removal of a falcotentorial meningioma taking care of its relationship with the venous and neural adjacent structures.
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