Endoscope-assisted retrosigmoid resection of a medium size vestibular schwannoma tumor model: a cadaveric study.

摘要: Abstract Objective To demonstrate a flexible endoscope assisted technique to perform microsurgical resection using retrosigmoid approach of an artificial polymer tumor model that mimics medium size (15–20 mm diameter) vestibular schwannoma. Methods Twelve bilateral dissections were performed in 6 glutaraldehyde embalmed, colored silicone injected, adult cadaveric heads. Using standard approach, we first implanted the at cerebellopontine angle (CPA) and then resected under simultaneous endoscopic microscopic visualizations. The was by creating corridor removing lower portion inserting through same mounted on surgical instrument order accomplish early visualization VII-VIII complex. This complex made possible expeditious removal with preservation Results We able successfully implant all specimens. post-tumor implantation CT scan confirmed optimal CPA location its intra-porus extension. exposure facial adjoining neuro-vascular structures excellent during stages accomplished minimal cerebellar retraction, intermittent endoscopic-assisted control. Early cochlear nerves led unhindered model. Conclusions simulating schwannoma feasible our study emulating real surgery. Visualization acousticofacial bundle stage should theoretically decrease risk inadvertent injuries as well facilitate complete tumor. Clinical studies validate this laboratory are necessary.