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Is the new classification of neuroendocrine pancreatic tumors of clinical help?

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Is the new classification of neuroendocrine pancreatic tumors of clinical help?

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A new concept of classifying neuroendocrine pancreatic tumors based on clinicopathologic patterns was summarized recently. To evaluate the clinical reliability and prognostic specificity of this classification system, 100 neuroendocrine pancreatic tumors were retrospectively categorized as “benign,” “uncertain,” and “malignant” based on tumor risk factors (size, local invasion and angioinvasion, cell atypia, metastases) and were followed for disease recurrence and progression. Altogether, 71 functioning tumors (insulinoma, gastrinoma, glucagonoma, enterochromaffin-like (ECL)oma, somatostatinoma) and 29 nonfunctioning neuroendocrine pancreatic tumors (NETs) were studied. NETs had an increased risk of malignancy (p < 0.05). Tumor size, gross invasion, and metastases correlated significantly with tumor behavior and allowed us to distinguish between "benign" and "malignant" tumors. About 89% of the tumors < or = 20 mm were "benign," whereas 71% > 20 mm were “malignant” (p < 0.05). In patie

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