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Figure 2: Preoperative and postoperative magnetic resonance imaging (MRI) and histopathological examination in Case 2 (a) and (b) MRI scan showed an anterior cranial fossa lesion. Ethmoidal sinus was invaded. (c) and (d) showed that the lesion was signifi cantly contrasted after injecting contrast medium. (e) and (f) showed that the lesion was completely removed. (g) showed typical schwannoma pathological characteristics (H and E, ×200)

Figure 2: Preoperative and postoperative magnetic resonance imaging (MRI) and histopathological examination in Case 2
(a) and (b) MRI scan showed an anterior cranial fossa lesion. Ethmoidal sinus was invaded. (c) and (d) showed that the lesion was signifi cantly contrasted after injecting contrast medium. (e) and (f) showed that the lesion was completely removed. (g) showed typical schwannoma pathological characteristics (H and E, ×200)