In the present study, Ki-67 IHC assessed by using methods A and C correlated well with the mRNA-based assessments of Luminal A-like and Luminal B-like (HER2 negative) tumours, although Methods A and C produced different Ki-67 values, namely, mean values of 21.3 and 16.1, respectively. Here, MKI67 is linked to neoplasm.