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Figure 1: Microphotograph showing (a) poorly differentiated tumor predominantly at subepithelial location (H and E, 100X); (b) large areas of necrosis, conspicuous nucleoli (H and E, 400X); (c) NUT1 speckled nuclear positivity (IHC, 400X); (d) p40 nuclear positivity (IHC, 400X) |
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