PIWIL2 and metastatic malignant neoplasm in the lymph nodes: A significant positive association was found for the Piwi-like 1 IRS with lymph node metastasis (rs = 0.224; P = 0.029), Piwi-like 2 staining (rs = 0.730; P < 0.001), CK20 staining (rs = 0.406; P < 0.001), or GATA 3 staining (rs = 0.363; P < 0.001).