LETM1 appears to be increased in several cancer subtypes and is linked to cancer stem cell‐like populations (Piao et al. 2009; Che et al. 2021; Ji and Hu 2020; Li et al. 2020; Piao et al. 2019; Wang et al. 2020a; Zhang et al. 2020; Zhou et al. 2020). This evidence concerns the gene LETM1 and cancer.