In particular, two differentially down-regulated REs (AluYg6 and LTR18B) were proposed as consistent biomarker candidates for both LUAD and SCLC diagnosis, another two (UCON88 and HERVK11D-Int) are differentially up-regulated, and a further 33 were proposed as SCLC-specific diagnostic biomarkers. Here, INTU is linked to small cell lung carcinoma.