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Figure 2: Pathological view. (a) Tumor composed of mature ganglion cells (black arrow) within Schwannian stroma (H and E, ×200). (b) Tumor showing diffuse S100 protein positivity (×200). (c) Mature ganglion cells with synaptophysin (×200). (d) Tumor showing low proliferation index (Ki-67 <1%)

Figure 2: Pathological view. (a) Tumor composed of mature ganglion cells (black arrow) within Schwannian stroma (H and E, ×200). (b) Tumor showing diffuse S100 protein positivity (×200). (c) Mature ganglion cells with synaptophysin (×200). (d) Tumor showing low proliferation index (Ki-67 <1%)