However, limited studies have explored the function of these EECTGs in cancer.Piwi like RNA‐mediated gene silencing 1 (PIWIL1), a lung cancer EECTG in our previous study, is the member of PIWI family and can bind to PIWIL‐interacting RNAs (piRNAs) during spermatogenesis 11. This evidence concerns the gene PIWIL1 and lung cancer.