Table 2.
Operation Characteristics
| Operation | sPN | mPN | Total | p value |
|---|---|---|---|---|
| n (%) | 43 (35.5) | 78 (64.5) | 121 | |
| Median Tumor Number (IQR) | 1.0 (1.0) | 9.0 (10.5) | 4.0 (9.0) | p<0.001 |
| Median Largest Tumor (IQR), cm | 2.6(2.1) | 3.6(1.5) | 3.5 (2.0) | p=0.001 |
| Prior Ipsilateral PN (%) | 12 (27.9) | 39 (50.0) | 51 (42.1) | p=0.02 |
| Median Time from PN (IQR), mo | 71.0 (67.8) | 80.6 (86.5) | 76.3 (75.6) | p=0.5 |
| Cytoreductive Procedures (%) | 8 (18.6) | 4(5.1) | 12 (9.9) | p=0.03 |
| Right Sided PN (%) | 21 (50.0) | 37 (48.1) | 58 (48.7) | p=0.9 |
| Robotic Approach (%) | 14 (32.6) | 7(9.1) | 21 (17.5) | p<0.01 |
| Median EBL (IQR), L | 1.4 (1.7) | 2.5 (3.3) | 2.0(3.2) | p=0.001 |
| Median UOP (IQR), mL | 450.0 (385.0) | 500.0 (439.0) | 470.0 (413.8) | p=0.4 |
| Clamp Used (%) | 17 (44.7) | 10 (26.3) | 27 (35.5) | p=0.2 |
| Median Clamp Time (IQR), mins | 24.0 (30.0) | 42.0 (29.0) | 35.0 (32.0) | p=0.3 |
| Median Op Time (IQR), mins | 315.0 (163.8) | 420.5 (169.3) | 410.0 (164.3) | p<0.01 |
| Median No. Units Transfused (IQR) | 1.0 (4.0) | 5.0 (7.0) | 4.0(7.0) | p<0.001 |
| Median POD Discharge (IQR) | 7.0 (3.0) | 8.0(5.5) | 7.5 (5.0) | p<0.001 |
| Median Follow Up Time (IQR), mo | 35.9 (71.1) | 42.5 (76.2) | 40.1 (74.5) | p=0.5 |
Tumor Number- Number of tumors with a cancer diagnosis on pathology resected, cysts and benign masses removed were excluded; Largest Tumor- greatest diameter of resected tumors as measured by pathology; Time from PN- months from date of prior PN on ipsilateral kidney; Cytoreductive procedures- PN performed on patients with metastatic disease; EBL=estimated blood loss; UOP=urine output; Op Time=operation time; No. Units Transfused- packed red blood cell units given during operation; Follow Up Time- months from date of surgery to date of urology or nephrology clinic visit or date of next PN