Figure 6From: Functioning glucagonoma associated with primary hyperparathyroidism: multiple endocrine neoplasia type 1 or incidental association? Histopathological examination of the pancreatic tumor. A) The tumor appears encapsulated and composed of polygonal cells with trabecular or ribbon-like proliferation (HE 5 X). B) At immunohistochemistry, neoplastic cells showed an intense diffuse staining for glucagon (Anti-glucagon antibody 5 X).Back to article page