Fig. 4

Agreement of two independent raters in quantifying TILs of 54 Luminal-BC specimens. The solid line is the line of equality, while the dashed lines represent the threshold for the three groups TILs classification: Low (< 10%), Intermediate (10–50%) and High (≥50%). The numbers indicate the absolute frequency of specimens classified by the two raters and the size of the circles is proportional to the frequency of specimens sharing the same TILs values