MKI67 and neoplasm: The difference between the categorical data of tumor size, tumor histology, HER 2 receptor, LVI, histological grade, physical examination, microcalcification, multifocality or multicentricity, axillary ultrasonographic findings, Ki-67 score ≥7.5, and Ki-67 score ≥14 between patients with and without SLN involvement was statistically significant (P < .001 for all except Ki-67 score ≥7.5 and P = .031 for Ki-67 score ≥14) (Tables 3 and 4).