Comparison of Trifecta and Pentafecta Outcomes across 3 Surgical Modalities of Partial Nephrectomy (PN) – Open, Lap, and Robotic

Abstract

Renal cell carcinoma (RCC) is the most common solid tumor in the kidney (90%), accounting for about 3% of all cancers in adults. Partial nephrectomy (PN) is the surgical procedure primarily used for the treatment of localized kidney tumors. Two commonly used terms to describe the complexity and success of a partial nephrectomy procedure are “trifecta” and “pentafecta.” Trifecta is defined as Warm ischemia time (WIT) ≤ 25min or Cold ischemia time (CIT) ≤ 60min, Negative surgical margin (NSM), and no perioperative Clavien-Dindo complications (CDC) of Gr 3 or more [8], whereas pentafecta is defined as trifecta plus >90% preservation of e-Glomerular filtration rate (GFR) and no increase in chronic kidney disease (CKD) stage at 12-months post-operative period. We retrospectively analyzed all patients who underwent partial nephrectomy at a single high-volume tertiary centre, from 2012 to 2020. We included patients who underwent partial nephrectomy by any of the three routes including open (OPN), laparoscopic (LPN), or robotic-assisted (RPN), and in which the follow-up data was available. We compared the trifecta and pentafecta outcomes across the three surgical modalities. We had a total of 183 patients in our study. Twenty-nine percent (53 patients) underwent open surgery, 12.6% (23 patients) underwent laparoscopic surgery and 58.5% (107) underwent robotic assisted surgery. The number of patients who fell under the low risk category in the RENAL scoring system were 70(38.3%), intermediate risk 79 (43.2%) and high risk 34 (18.6%). In the high risk RENAL score group, trifecta was achieved in 5 (50%) patients in OPN, 1(50%) in LPN and 7(31.8%) in RPN with no statistically significant difference (p = 0.581) whereas pentafecta was achieved in 3 (30%) patients in OPN, 1 (50%) in LPN and 7 (31.8%) in RPN with no statistically significant difference (0.855). In the overall cohort, mean WIT, mean hospital stay and mean EBL were higher in OPN as compared to LPN and RPN which was statistically significant (p < 0.001), whereas there was no statistical difference in mean operative time between the three modalities (p = 0.580). Renal tumors can be safely treated by RPN or LPN with lesser morbidity as compared to OPN. Trifecta and Pentafecta outcomes had no significant difference among OPN, LPN, and RPN. RPN and LPN may be considered feasible and safe surgical approaches ensuring good functional outcomes.

Keywords

• Partial Nephrectomy
• Trifecta
• Pentafecta
• Laparoscopic PN
• Robotic PN