SACK1A and breast cancer: In light of this data, we analyzed the FAM83A and EGFR immunostaining in the different BC subtypes present in our TMA and found a significant EGFR-FAM83A correlation in ER + BC (N = 176; r = 0.21, p = 0.004 for positivity and r = 0.15, p = 0.04 for H-score).