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Figure 2: Photomicrographs show a lobulated tumor (a; H and E, ×10) with foci of necrosis (b; H and E, ×10) and cells arranged in sheets (c; H and E, ×20), glandular (d; H and E, ×20) and acinar (e; H and E, ×20) patterns; tumor cells have abundant granular cytoplasm and vesicular nuclei (f; H and E, ×40), are positive for chymotrypsin (g; immunohistochemistry, ×20) and low Ki-67 labeling index (h; H and E, ×20)

Figure 2: Photomicrographs show a lobulated tumor (a; H and E, ×10) with foci of necrosis (b; H and E, ×10) and cells arranged in sheets (c; H and E, ×20), glandular (d; H and E, ×20) and acinar (e; H and E, ×20) patterns; tumor cells have abundant granular cytoplasm and vesicular nuclei (f; H and E, ×40), are positive for chymotrypsin (g; immunohistochemistry, ×20) and low Ki-67 labeling index (h; H and E, ×20)