Ortiz-Ruiz et al. [4] interrogated published gene expression data from breast cancer using the Kaplan-Meier Online Tool (KM Plotter) [6] and found that ERK5 mRNA overexpression associated with poor relapse-free survival in node-positive basal-like and HER2-enriched breast cancers. The gene discussed is MAPK7; the disease is breast carcinoma.