PIWIL1 and lung carcinoma: 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.