Non-G cell gastrin-producing tumours of the pancreas
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Three pancreatic gastrinomas, associated with the Zollinger-Ellison syndrome, were examined by staining, cytochemical and immunohistochemical, and ultrastructural techniques in order to compare the properties of their storage granules with those of normal gastrin-producing cells. In all three cases, despite their positive anti-gastrin fluorescence, there was only a partial correspondence of properties with those of the pyloric G cell or the pancreatic islet D cell.
It is concluded that the available evidence supports the origin of pancreatic gastrinomas from the gastrin-secreting D cell of the normal islet. The relationship of the “small cell” of the normal islet to the D cell on the one hand, and to the gastrinoma cell on the other, has not been determined.
KeywordsCell Granule Islet Cell Pancreatic Islet Endocrine Cell Islet Cell Tumor
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