Table 7 Comparison of inherent aggressiveness of different Bosniak classifications
Variables | Bosniak I, II, and IIF | Bosniak III | Bosniak IV | P |
|---|---|---|---|---|
No. of patients | 52 | 194 | 177 | Â |
No. of histologic subtyp (%) | Â | Â | Â | < 0.001 |
 ccRCC | 19 (36.5) | 149 (76.8) | 144 (81.4) |  |
 MCRNLMP | 15 (28.8) | 20 (10.3) | 7 (4.0) |  |
 pRCC | 11 (21.2) | 12 (6.2) | 8 (4.5) |  |
 cRCC | 1 (1.9) | 7 (3.6) | 6 (3.4) |  |
 Others | 6 (11.5) | 6 (3.1) | 12 (6.8) |  |
No. of malignant potential (%) | Â | Â | Â | < 0.001 |
 High aggressiveness | 29 (55.8) | 153 (78.9) | 150 (84.7) |  |
 Low aggressiveness | 23 (44.2) | 41 (21.1) | 27 (15.3) |  |
No. of Fuhrman grade (%) | Â | Â | Â | < 0.001 |
 I | 20 (66.7) | 19 (11.2) | 12 (7.4) |  |
 II | 10 (33.3) | 142 (83.5) | 139 (85.8) |  |
 III | 0 | 9 (5.3) | 11 (6.8) |  |