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Fig. 1 | BMC Neurology

Fig. 1

From: Schwannomas of the greater superficial petrosal nerve – case series, discussion of surgical techniques, and review of literature

Fig. 1

A Preoperative axial CT scan displaying an enlarged GSPN canal in the petrous bone (arrow) as well as osseous destruction of the mastoid. B A closer view showing no continuity of the auditory ossicles, with subtotal shading of the tympanic cavity. C Coronal reconstruction shows the tumor invading the petrous bone with osseous destruction. The tegmentum tympanii is thinned out (arrow). D Notice the mass effect in the mastoid (arrow)

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BMC Neurology

ISSN: 1471-2377

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