The mRNA expression of H3 histone demethylases displayed statistically significant differences between claudin-low and basal cancers in the case of KDM1A (mean mRNA z-score of 1.04 in basal cancers and 0.002 in claudin-low cases, t test corrected for multiple comparisons, p = 0.001) and KDM5B (mean mRNA z-score of 0.05 in basal cancers and −0.86 in claudin-low cases, t test corrected for multiple comparisons, p = 0.001). Here, KDM1A is linked to cancer.