PPP1CA and neoplasm: serine/threonine‐specific protein phosphatase (PP1A) has emerged as a key tumor‐specific target because of its role in dephosphorylation.[15] It has been reported that PP1A expression is increased in various types of cancer and is associated with tumor progression and a poor prognosis.[15, 16] However, the role of PP1A in the regulation of ferroptosis and antitumor immunity remains unclear.