The univariate analysis showed that parameters, such as age, menopausal status, number of patients with high Ki-67 expression level, US-reported maximum tumor diameter (MTD), histopathological type, stiff rim sign, and ultrasound BI-RADS classification were not significantly different between the training and validation cohorts (all P>0.05), except for US-reported ALN status (P=0.027). Here, MKI67 is linked to neoplasm.