Fig. 2

A No pseudocapsule between tumor and renal parenchyma. B Pseudocapsule (PC) intact and without infiltration of tumor cells (invasion (−)). C PC infiltrated by tumor cells but with no invasion beyond it (invasion (+)). D PC with neoplastic infiltration beyond it (invasion (++)), with the depth of tumor invasion at about 14 mm (the scale bar: 300 μm). Abbreviations: T, tumor; K, kidney