The mRNA expression of RAC1 in the Hungarian Academy of Science breast cancer cohort (http://www.ncbi.nlm.nih.gov/pubmed/20020197) ER-ve breast cancer cohort suggests that high expression denotes poor outcome for RFS HR=1.48 [CI:1.15-1.9] p=0.0019 when split on the median. Here, RAC1 is linked to breast carcinoma.