MKI67 and neoplasm: Luminal and triple-negative CMCs, identically defined by Nielsen or Blows, significantly differed by their mean pathologic tumor sizes (p = 0.042), by being significantly higher in triple-negative (18 ± 7 mm) than in luminal (16 ± 6 mm) CMCs, and by parameters related to cell proliferation, i.e., mitotic index (p = 0.007) and Ki-67 index (p = 0.002), being significantly higher in triple-negative CMCs (respectively 43 ± 31 mitoses and 38 ± 17%) compared with luminal CMCs (respectively, 34 ± 21 mitoses and 31 ± 17%).