Disposal of Occipital Condyle in Far Lateral Approach for Ventrolateral Foramen Magnum Meningiomas

The surgical approach for ventrolateral FMMs varies depending on the location of dural attachment with reference to VA dural entry. Bone removal is warranted in FMMs arising from both sides of the VA to allow superolateral displacement of the VA to some extent, improving surgical accessibility to the hidden VA auxiliary space and achieving a more radical tumor resection. It should be a reasonable alternative to the conventional aggressive VA transposition in cases of ventrolateral FMMs.