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Figure 2: (a) Photomicrograph showing monomorphic tumor cells arranged in small clusters, nests, and sheets suggestive of neuroendocrine differentiation (H and E, ×100), (b) tumor cells are seen invading the fibroconnective stroma (H and E, ×200), (c) individual tumors cells are round with scant eosinophilic cytoplasm and round to oval hyperchromatic nucleus (H and E, ×400), (d) photomicrograph showing tumor necrosis and crush artifact commonly seen in small cell neuroendocrine carcinoma (H and E, ×200)

Figure 2: (a) Photomicrograph showing monomorphic tumor cells arranged in small clusters, nests, and sheets suggestive of neuroendocrine differentiation (H and E, ×100), (b) tumor cells are seen invading the fibroconnective stroma (H and E, ×200), (c) individual tumors cells are round with scant eosinophilic cytoplasm and round to oval hyperchromatic nucleus (H and E, ×400), (d) photomicrograph showing tumor necrosis and crush artifact commonly seen in small cell neuroendocrine carcinoma (H and E, ×200)