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248039.fig.0015b
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Figure 15: Neurovascular compression in a patient presenting with left hemifacial spasm. Axial CISS (a) and T1 postcontrast MRI (b) images demonstrate the left vertebral artery (arrow) abutting the left facial nerve at the root entry zone. Axial noncontrast CT scan (c) demonstrates the hyperdense postsurgical material from microvascular decompression surgery.