MKI67 and neoplasm: Between Ki-67 expression and patient age (rsp = 0.343, p = 0.010), tumour diameter (rsp = 0.626, p < 0.001) or T stage (τ = 0.432; p < 0.001) a positive correlation was noted, but a negative association between Ki-67 index and patient overall survival (rsp = − 0.270, p = 0.050).