ITGA4 and cancer: Using the TISIDB database, we explored potential correlations between ITGA4 expression and the molecular and immune subtypes of various cancers, noting variable ITGA4 expression in molecular subtypes within BRCA, HNSC, KIRP, LGG, LIHC, OV, PCPG, STAD, and UCEC—for example, elevated expression levels in STAD’s EBV subtype and HNSC’s Mesenchymal subtype (Supplementary Figure S1B).