ENPP1 and neoplasm: To investigate the role of tumor exosomal ENPP1 in the LL‐37‐2′3′‐cGAMP‐mediated cGAS‐STING signaling pathway, THP1‐Lucia ISG cells were treated with LL‐37‐2′3′‐cGAMP in presence of tumor‐derived exosomes, and corresponding controls were set.