Table 3.
Clinical and pathological characteristics of patients in the partial nephrectomy (PN) group: elective partial nephrectomy (ePN) vs imperative partial nephrectomy (iPN).
| PN | ePN | iPN | P value | |
|---|---|---|---|---|
| Patients, n | 91 | 57 (62.6) | 34 (37.4) | |
| Age in years, mean (median) | 59.4 (62) | 56.2 (57) | 64.7 (65) | 0.002 |
| Gender n (%) | ||||
| M | 61 (67.0) | 36 (61.8) | 25 (73.5) | 0.309 |
| F | 30 (33.0) | 21 (38.2) | 9 (26.5) | |
| Symptoms at diagnosis, n (%) | ||||
| No | 57 (67.1) | 40 (72.7) | 17 (56.7) | 0.320 |
| Yes | 28 (32.9) | 15 (27.3) | 13 (43.3) | |
| ASA score, n (%) | ||||
| ≤ 2 | 57 (80.3) | 38 (86.4) | 19 (70.4) | 0.021 |
| ≥ 3 | 14 (19.7) | 6 (13.6) | 8 (29.6) | |
| ECOG PS, n (%) | ||||
| 0 | 40 (66.7) | 28 (73.7) | 12 (54.6) | 0.036 |
| ≥ 1 | 20 (33.3) | 10 (26.3) | 10 (45.4) | |
| Radiological tumor size in cm, mean (median) | 8.2 (8.0) | 8.1 (8.0) | 8.3 (8.0) | 0.102 |
| RENAL score | ||||
| ≤ 8 | 34 (44.16) | 23 (47.9) | 2 (11.8) | 0.250 |
| ≥ 9 | 43 (55.84) | 25 (52.1) | 15 (88.2) | |
| Approach, n (%) | ||||
| Open | 61 (67.0) | 36 (63.2) | 25 (73.5) | 0.585 |
| Classical laparoscopy | 6 (6.6) | 4 (7.0) | 2 (5.9) | |
| Robot assisted | 24 (26.4) | 17 (29.8) | 7 (20.6) | |
| Histology, n (%) | ||||
| Clear cell | 57 (62.6) | 35 (61.4) | 22 (64.7) | 0.753 |
| Others | 34 (37.4) | 22 (38.6) | 12 (35.3) | |
| ISUP grade, n (%) | ||||
| Low grade, ≤ 2 | 47 (54.0) | 34 (63.0) | 13 (39.4) | 0.078 |
| High grade, ≥ 3 | 40 (46.0) | 20 (37.0) | 20 (60.6) | |
| pT stage, n (%) | ||||
| pT3a | 28 (30.8) | 16 (28.1) | 12 (35.3) | 0.470 |
| < pT3a | 63 (69.2) | 41 (81.9) | 22 (64.7) | |
| Invasion of renal fat, n (%) | ||||
| Yes | 23 (25.3) | 11 (19.3) | 12 (35.3) | 0.075 |
| No | 68 (4.7) | 46 (80.7) | 22 (64.7) | |
| Invasion of peri-sinusal fat, n (%) | ||||
| Yes | 8 (9.5) | 6 (11.3) | 2 (6.5) | 0.463 |
| No | 76 (90.5) | 47 (88.7) | 29 (93.5) | |
| Tumoral thrombus in the renal vein, n (%) | ||||
| Yes | 2 (2.4) | 2 (3.8) | 0 (0,0) | 0.274 |
| No | 82 (97.6) | 51 (96.2) | 31 (100.0) | |
| Microvascular invasion, n (%) | ||||
| Yes | 9 (11.7) | 5 (10.4) | 4 (13.8) | 0.655 |
| No | 68 (88.3) | 43 (89.6) | 25 (86.2) | |
| Tumor necrosis, n (%) | ||||
| Yes | 27 (41.5) | 18 (41.9) | 9 (40.9) | 0.941 |
| No | 38 (58.5) | 25 (58.1) | 13 (59.1) | |
| Sarcomatoid component, n (%) | ||||
| Yes | 2 (2.5) | 0 (0.0) | 2 (6.9) | 0.055 |
| No | 79 (97.5) | 52 (100.0) | 27 (93.1) | |
| Positive surgical margins, n (%) | ||||
| Yes | 8 (8.9) | 4 (7.0) | 4 (12.1) | 0.412 |
| No | 82 (91.1) | 53 (93.0) | 29 (87.9) | |
PN: partial nephrectomy; ePN: elective partial nephrectomy; iPN: imperative partial nephrectomy.