Similar associations between ferritin expression and survival in GBM have previously been reported, with a reduction of ferritin expression leading to reduced tumor cell growth.16 Importantly, we found that high expression of the ferritin subunits ferritin heavy chain (FTH) and ferritin light chain (FTL) predicted shorter survival in female GBM patients, while no differences were present in male patients. This evidence concerns the gene FTL and glioblastoma.