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. 2016 Apr 27;8(4):e588. doi: 10.7759/cureus.588

Figure 8. Miniature Retrosigmoid Keyhole Approach.

Figure 8

The skull base regions accessible through this approach (A). Postoperative incision site (B). Keyhole craniotomy less than 3 cm (C). Preoperative post-contrast axial T1 MRI shows complex left posterior clinoid/petroclival meningioma (D). Postoperative axial MRI (E).