Figure 10 | Scientific Reports

Figure 10

From: Treatment Strategy for Petroclival Meningiomas Based on a Proposed Classification in a Study of 168 Cases

Figure 10

Intraoperative figures demonstrating steps of petroclival type resection via the RTTA. (a) Exposure of the tumor part of the superior and medial clival region after cerebellar retraction via the retrosigmoid approach. (b) Coagulation of the origin of tumor, performed intratumoral decompression, and then incision of the tentorium after removing the tumor located in the posterior fossa. (c) Separation of the adhesion between the tumor and brain stem. (d) Resection of the supratentorial part by piecemeal resection through incised tentorium cerebelli hiatus. (e) Separation of the adhesion between the suprotentorial tumor and CN III. (f) Gross total tumor resection and keeping well the neurovascular structures integrity. (g–i) The corresponding illustrations of main steps of RTTA. Tu, Tumor; PCNs, Posterior Cranial Nerves; PV, Petrosal Vein; Te, Tentorium; BS, Brainstem.

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