FOXP3 and metastatic malignant neoplasm in the lymph nodes: FOXP3 expression was significantly elevated in advanced disease features, including N2 lymph node metastasis (14.77 ± 9.42, p < 0.05), histological grade G3 (11.69 ± 6.73, p < 0.05), and stage IIIB (19.72 ± 4.15, p < 0.05).