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- W2462451569 abstract "Microscopic venous and lymphatic invasion is a known prognostic factor for various cancers, but its prognostic relevance for pancreatic neuroendocrine tumors (PNETs) is unclear. Thirty-two consecutive patients with PNET who had complete resection were included in this study. Venous and lymphatic invasion was identified on elastic tissue or immunohistochemical staining, and correlated with other clinicopathological factors, including recurrence-free survival. Venous and lymphatic invasion was identified in nine (28%) and three (9%) patients, respectively. Tumors with venous invasion were of significantly larger size, higher Ki-67 index, and higher mitotic counts. Patients with venous invasion showed significantly worse prognosis than those without venous invasion (P = 0.001). Five of nine patients (56%) with venous invasion had tumor recurrence, while a relapse was found in one case in patients without venous invasion (n = 23). Lymphatic invasion was not correlated with any other clinicopathological parameters including lymph node metastasis and recurrence-free survival. Predictive factors for recurrence in univariate analysis included microscopic venous invasion, tumor size ≥ 20 mm, non-functionality, and WHO grades. In multivariate analysis where WHO grades and microscopic venous invasion were applied, venous invasion remained a significant predictor of poor recurrence-free survival (P = 0.021). Microscopic venous invasion may serve as a predictive factor for tumor recurrence in patients with resectable PNET. The combination of WHO grades and microscopic venous invasion may assist in the stratification of the patients for risk of tumor recurrence." @default.
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- W2462451569 date "2016-09-01" @default.
- W2462451569 modified "2023-10-16" @default.
- W2462451569 title "Microscopic venous invasion in patients with pancreatic neuroendocrine tumor as a potential predictor of postoperative recurrence" @default.
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- W2462451569 doi "https://doi.org/10.1016/j.pan.2016.06.008" @default.
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