Overall, GRB7 expression in normal breast and breast cancer tissues was found mainly in the cytoplasm of epithelial cells, with high expression (score of 3+) in 19.15% of the samples, medium expression (score of 2+) in 15.14% of the sections, weak expression (score of 1+) in 25.17% of the samples and the absent of staining (score of 0) in the rest (40.53%). Here, GRB7 is linked to breast cancer.