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Figure 4: (a and b) Case of a malignant peripheral nerve sheath tumor, diagnosed as schwannoma, on biopsy (H and E, ×2000). On review, the biopsy lacked features of malignancy. (c and d) On resection, sarcomatous areas with prominent mitoses seen, juxtaposed with areas of schwannoma (asterix), sampled in the biopsy (H and E, ×400)

Figure 4: (a and b) Case of a malignant peripheral nerve sheath tumor, diagnosed as schwannoma, on biopsy (H and E, ×2000). On review, the biopsy lacked features of malignancy. (c and d) On resection, sarcomatous areas with prominent mitoses seen, juxtaposed with areas of schwannoma (asterix), sampled in the biopsy (H and E, ×400)