…discovery cohort, which included 519 patients across five cancer types: bladder cancer (n = 27), esophagogastric cancer (n = 40), head and neck squamous cell carcinoma (HNSCC) (n = 10), melanoma (n = 148), and NSCLC (n = 294)….TET1-MUT was significantly enriched in patients responding to ICI treatment (Fig (Fig2a)2a) (P = 0.003), indicating that TET1-MUT may be a potential predictive biomarker for ICI treatment.