In NPC context, another particularly interesting candidate is Galectin‐9 (Gal9) that is found on NPC SEVs (Keryer‐Bibens et al., 2006; Pioche‐Durieu et al., 2005) and has various immunosuppressive capacities that greatly impact on the anti‐tumour response. This evidence concerns the gene LGALS9 and nasopharyngeal carcinoma.