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Pathology of the endocrine pancreas

PU Heitz, M Kasper, JM Polak and G Kloppel

An immunocytochemical analysis of 94 pancreatic endocrine tumors revealed that 73 tumors were multicellular. Significant amounts of somatostatin and human pancreatic polypeptide were found by radioimmunoassay in extracts of 19 and 17 tumors resp., in addition to the hormone causing the clinical syndrome. Numerous tumors contained ductular structures. In the surrounding pancreatic parenchyma a proliferation of small ducts and budding-off from the ductular epithelium of endocrine cells was often observed. These features are hallmarks of nesidioblastosis of the endocrine pancreas which is a hyperplasia. In multiple endocrine neoplasia I hyperplasia of the endocrine pancreas is combined with larger nodules, currently labeled tumors. On the basis of these findings it is conceivable that pancreatic endocrine tumors are not primarily neoplastic and autonomous but that they are rather of hyperplastic origin.

Volume 27, Issue 10, pp. 1401-1402, 10/01/1979
Copyright © 1979 by The Histochemical Society


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