KCTD21 and non-small cell lung carcinoma: The m6A-methylated form of the lncRNA KCTD21-AS1 influences CD47 and TIPRL expression via miR-519d-5p, impacting macrophage phagocytosis and autophagy in non-small cell lung cancer (NSCLC) tissues and ultimately correlating with poor survival in NSCLC patients.