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Fig. 9 | BMC Neurology

Fig. 9

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

Fig. 9

A, B Preoperative coronal CT scan, demonstrating the infiltrative and destructive behavior of the known GSPN schwannoma (arrowed circle), mastoid cells are shaded and displaced and a widened canal of the facial knee (arrows in A, B). C, D Axial sequences, highlighting the widened canal (arrow in C) and the osseous destruction of the mastoid and further parts of the petrous bone with the involvement of the jugular bulb and foramen and the sigmoid sinus (arrows in D)

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