PLAU and neoplasm: Of the uPA-positive EOC sections, weak staining (1+) was found in 15% (16 out of 105) (Figure 3A), moderate staining (2+) in 45% (47 out of 105) (Figure 3D) and strong staining (3+) in 40% (42 out of 105) in primary tumours, whereas weak staining was found in 19% (7 out of 36), moderate staining in 44% (16 out of 36) and strong staining in 36% (13 out of 36) (Figure 3G) in metastatic lesions.