Using TCGA RNA sequencing level 3 data, we found that RNA expression levels of STAT3 and IL5 were significantly higher in 113 normal tissue samples compared to 989 breast tumor samples (p value = 1.3 × 10−3 and 7.0 × 10−4, respectively, Online Resources 20 and 21), while overall expression of IL5 was low in both tissues. Here, STAT3 is linked to breast neoplasm.