BTG1 and metastatic malignant neoplasm in the lymph nodes: Previous research reports have found that the BTG1 gene has abnormally low expression in breast cancer, gastric cancer, non-small-cell lung cancer, and pancreatic cancer tissues compared to normal tissues and is related to multiple clinical features such as lymph node metastasis, TNM (Tumor Node Metastasis) stage, and prognosis [50–53].