Fig. 3

Overall survival curves for all patients with or without lymphovascular invasion in terms of T stage. a: the 5-year OS of T1 stage patients with LVI were significantly lower than those without LVI (χ2 = 9.061 p = 0.003); b: the 5-year OS of T2 stage patients with LVI were significantly lower than those without LVI (χ2 = 5.751 p = 0.016); c: the 5-year OS of T3 stage patients with LVI were significantly lower than those without LVI (χ2 = 4.501 p = 0.034); d: the 5-year OS of T3 stage patients with LVI were significantly lower than those without LVI (χ2 = 4.556 p = 0.033)