ERBB2 and metastatic malignant neoplasm in the lymph nodes: We observed elevated levels of PMN-MDSCs in the TT vs. AT from advanced stage, low grade, lymph node metastasis, HER2−, and primary resected AEG patients (p < 0.001, p < 0.01, p < 0.01, p < 0.05, p < 0.05, respectively; Figures 4A–E).