Usefulness of Image Guidance in the Surgical Treatment of Petrous Apex Cholesterol Granuloma

<table>Intraoperative screenshot shows the direction of drilling and the relationship between the surgical route and the surrounding structures (<i>blue</i>: jugular bulb; <i>yellow</i>: cochlea; <i>red</i>: internal   carotid artery; <i>green</i>: petrous apex lesion).</table>

Case Reports in Otolaryngology

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Figure 5

Figure 5: Usefulness of Image Guidance in the Surgical Treatment of Petrous Apex Cholesterol Granuloma 