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Histologic scoring system consisting of scores for tumor invasiveness into the kidney and spleen
| Location | Score | Degree of Invasion |
|---|---|---|
| Tumor Invasiveness into Kidney | 0 | None |
| 1 | <50% Tumor Infiltration | |
| 2 | >50% Tumor Infiltration | |
| 3 | No recognizable kidney tissue left | |
| Tumor Invasiveness into Spleen | 0 | None |
| 1 | Pressing on the organ | |
| 2 | Infiltration of the organ, <50% | |
| 3 | Infiltration of the organ, >50% |
