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Kndocrine tumors arise from the neuroendocrine cells of the pancreas predominantly in the islets of Ihe pancreatic body and tail. However, enterochromaffin cells and other neuroendocrine cells can arise anywhere in Ihe GI tract. Endocrine tumors are rare in older persons. These tumors are indistinguishable microscopically without special immunochemical staining. Localization of tumors can be [...]

Hemangioma, the most common benign neoplasm of the liver, is found in about 5% of adult aulopsies. Other benign tumors include hepatocellular adenoma and local nodular hyperplasia, which are most often associated with oral contraceplives and are not usually seen in elderly persons. Bile duct adenomas and cystadenomas and rare mesenchymal tumors have also been [...]