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Fig. 4 | Chinese Neurosurgical Journal

Fig. 4

From: Retrosigmoid-transtentorial approach for petroclival meningiomas: operative technique and clinical outcome

Fig. 4

Intraoperative pictures demonstrating surgical steps of tumor resection via RTTA. a Expose the tumor in the superior and medial clival region after cerebellar retraction via the retrosigmoid approach. b Coagulate the tumor basement, perform intratumoral decompression, and then incise the tentorium after removing the tumor located in the posterior fossa. c Separate the adhesion between the tumor and brain stem. d Remove the the suprotentorial tumor by piecemeal resection through incised tentorium cerebelli hiatus. e Separate the adhesion between the suprotentorial tumor and CN III. f Remove the tumor totally and keep well the neurovascular structures integrity (Tu: Tumor, PCNs: Posterior Cranial Nerves, PV: Petrosal Vein, Te: Tentorium, BS: Brain Stem)

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