PMC3658259_01
Case 3: Carcinoid and adenocarcinomatous portion (hematoxylin and eosin staining, high power).
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This was a mucinous tumor containing irregular glands lined by mucinous epithelium with large areas of extracellular mucin material consistent with adenocarcinoma, with an adjacent area showing monomorphic cells in solid nests, consistent histopathologically with a diagnosis of carcinoid tumor (Figure 6).
Case 3: Chromogranin positivity of carcinoid portion.
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Immunohistochemistry showed the carcinoid area to be chromogranin-positive (Figure 7).