Table 1.
Patient and Tumor Characteristics
| Operation No./Patient No. | 19/17 | ||
| Staged bilateral procedures | 2 (10.5%) | ||
| Median age, yrs (range) | 47 (26 to 76) | ||
| Median BMI (range) | 29.8 (19.8 to 40.4) | ||
| Male (%) | 9 (53) | ||
| Surgery on the right, No. (%) | 11 (58) | ||
| Hereditary disease, No. (%) | 11 (58) | ||
| VHL | 9 (47) | ||
| BHD | 1 (5) | ||
| TS | 1 (5) | ||
| Median follow-up, mo (range) | 22 (12 to 36) | ||
| Median tumors per patient, # (range) | 1 (1 to 4) | ||
| Median largest tumor (range) | 5.0 (4.1 to 15) | ||
| Nephrometry scores | 1 | 2 | 3 |
| R (size criteria) | 0 | 15 (79%) | 4 (21%) |
| E (endophytic/exophytic) | 2 (10.5%) | 15 (79%) | 2 (10.5%) |
| N (nearness to sinus or calyx) | 2 (10.5%) | 9 (42%) | 8 (47.5%) |
| A (anterior or posterior) | A = 12 (63%) | P = 7 (37%) | |
| L (location relative to polar line) | 5 (26%) | 4 (21%) | 10 (53%) |
| Hilar designation | 6 (31.5%) | ||
| Total nephrometry score | |||
| 4 | 0 | ||
| 5 | 0 | ||
| 6 | 1 (5.3%) | ||
| 7 | 2 (10.5%) | ||
| 8 | 2 (10.5%) | ||
| 9 | 8 (42.1%) | ||
| 10 | 4 (21%) | ||
| 11 | 2 (10.6%) | ||
| 12 | 0 | ||
| Median nephrometry score of largest tumor | 9 | ||
| Largest tumor histology, # (%) | |||
| Clear cell | 11 (58) | ||
| Papillary type 1 | 4 (21) | ||
| Chromophobe | 2 (11) | ||
| Oncocytoma | 1 (5) | ||
| Angiomyolipoma | 1 (5) | ||