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Chapter 49. Skull Base Surgery
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The following is a contraindication to an extended endoscopic approach to anterior skull base tumors:
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A. Extension through lateral maxillary sinus wall
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B. Involvement of the cavernous sinus
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D. Tumor extension superolateral to orbital nerve
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F. A, B, C, and D are correct
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This cerebellopontine angle lesion has the characteristic MRI finding of high signal intensity on both T1- and T2-weighted images:
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Which one of the following is considered a “relative,” rather than “absolute” contraindication to surgery of the skull base?
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A. Invasion of both cavernous sinuses
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B. Invasion of the optic chiasm
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C. Invasion of bilateral carotid arteries
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D. Invasion of the spinal cord
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E. Invasion of the brain stem
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This approach is ideal for small intracanalicular tumors where hearing preservation is a priority:
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C. Translabyrinthine approach
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D. Retrolabyrinthine approach
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The most important predictor of 5-year survival in the resection of skull base malignancies is:
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A. A watertight dural seal
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B. Tumor-free margins at the end of resection
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C. The use of postoperative radiation therapy
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D. The use of free-flap reconstruction
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E. The use of laser for resection of the tumor