TNS4 (tensin 4) is a focal adhesion protein that plays crucial roles in cancer progression through multiple mechanisms. TNS4 promotes cell migration by displacing TNS3 from integrin ITGB1, leading to focal adhesion disassembly and actin stress fiber reorganization. In head and neck squamous cell carcinoma, TNS4 stabilizes integrin α5β1 complexes and activates FAK-mediated PI3K/Akt and TGFβ signaling pathways, with HIF-1α transcriptionally regulating TNS4 under hypoxic conditions 1. TNS4 expression is consistently upregulated across multiple cancers including colorectal 23, gastric 4, lung adenocarcinoma 5, and gallbladder cancers 6. This upregulation correlates with poor patient prognosis and enhanced metastatic capabilities 54. Mechanistically, TNS4 is regulated by Wnt signaling in colorectal adenomas 7 and promotes lymph node metastasis by interacting with integrin β1 and activating fibroblastic reticular cells 8. TNS4 also modulates EGFR signaling, with knockdown increasing sensitivity to gefitinib treatment 3. The protein's epigenetic activation through promoter hypomethylation contributes to gastric cancer development 4, establishing TNS4 as a potential therapeutic target and prognostic biomarker across multiple cancer types.