Although Pn1 was associated with a tendency toward worse survival, it did not reach statistical significance.
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Influence of Perineural (Pn), Lymphangio (L) and Vascular (V) Invasion on Survival after Resection of Perihilar Cholangiocarcinoma.
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The sentences
Vascular invasion was associated with a significantly worse overall survival, while perineural invasion showed a trend toward worse overall survival, although this was not statistically significant.