Immunohistochemical expression of PLOD2 in breast cancer tissues and tissues adjacent to breast cancer. (A, B) Negative staining of PLOD2 in tissue adjacent to breast cancer (magnification: A × 40 and B × 100). (C, E, G, I) Respectively represent negative, weak, moderate, and strong staining of PLOD2 in the cytoplasm of breast cancer tissues (× 40 magnification). (D, F, H, J) Respectively represent negative, weak, moderate and strong staining of PLOD2 in the cytoplasm of breast cancer tissues (× 100 magnification).