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Nomogram predicting the probability of 5-year recurrence-free survival. Points are assigned for number of positive lymph nodes, Ki-67, tumor diameter, presence of vascular invasion or perineural invasion, by drawing a line upward from the corresponding values to the “Points” line. The sum of these 3 points, plotted on the “Total points” line, corresponds to predictions of 5-year recurrence-free probabilities.
