TBX21 and metastatic malignant neoplasm in the lymph nodes: An interaction analysis (Additional file 1: Figure S1) based on the four categories formed by patients with absence or presence of lymph node metastases and a high or low pixel count for Tbet+ cells confirmed the positive effect of Tbet+ cells for DFS (p = 0.032; Log-Rank) and DSS (p = 0.062; Log-Rank).