CTLA4 and neoplasm: No difference could be found between patients with CTLA4-positivity and CTLA4-negativity on tumor in 5-year DFS (CTLA-4(+), 51.4% vs CTLA-4(−), 53%, p = 0.846) and DSS rates (CTLA4(+), 51.1% vs CTLA4(−), 58.2%, p = 0.814).