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Figure 2: (a) Papillary tufts lined by endothelial cells (H and E, ×100); (b) tumor cells show 2% nuclear staining for Ki-67 (IHC, ×200)

Figure 2: (a) Papillary tufts lined by endothelial cells (H and E, ×100); (b) tumor cells show 2% nuclear staining for Ki-67 (IHC, ×200)