LAG3 and neoplasm: A reservoir of stem-like neoantigen-reactive TILs, such as CD8+ cells expressing activation or exhaustion markers (PD-1, TIM-3, and LAG-3), expand prolifically and supply differentiated subsets promotes T cell persistence and long-term tumor control, thereby strengthening the anti-tumor response.518,519 With high-throughput transcriptomic and TCR sequencing, neoantigen-specific TCR clonotypes dysfunctional characteristics were utilized to detect anti-tumor TCRs with minimal TIL material.