MKI67 and neoplasm: Interestingly, we observed that an only a median of 143.00 cell/mm2 [minimum (min) 0 cell/mm2; maximum (max) 524.14 cell/mm2] of the total panCK+ cells co-expressed KI67, and of those, only a median of 9.03 cell/mm2 (min 0 cell/mm2; max 318.89 cell/mm2) expressed PD-L1 + (panCK + KI67 + PD-L1 +), showing active proliferation of a small number of tumor cells, Table 1.