Strikingly, we observed that GPX7 was overexpressed in 19 datasets (brain, breast, esophageal, gastric, liver cancers, leukemia, melanoma, myeloma and sarcoma) and underexpressed in lymphomas (Fig. 1a), indicating that the dysregulation of this glutathione peroxidase was a common phenomenon across several tumors. This evidence concerns the gene GPX7 and plasma cell myeloma.