CDKN2A and neoplasm: In the same manner, it is possible to establish a link between response to immunotherapy and several ferroptosis-related prognosis genes, such as FTH1, fms-related receptor tyrosine kinase 3 (FLT3), cyclin-dependent kinase inhibitor 2A (CDKN2A), and DNA damage inducible transcript 3 (DDIT3) [47], which also relate to the tumor’s immunoscore [25,47].