The Usefulness of Martini's Nomogram and the Evaluation of Trifecta and Pentafecta Criteria in Renal Cancer: A Comparison of Open and Robot-Assisted Partial Nephrectomy.
This study aimed to compare the outcomes of open partial nephrectomy (OPN) and robot-assisted partial nephrectomy (RAPN) based on preoperative risk assessment using Martini's nomogram and postoperative trifecta and pentafecta criteria.
We retrospectively reviewed patients who underwent OPN or RAPN between 2017 and 2021. Renal function was assessed pre- and postoperatively using estimated glomerular filtration rate (eGFR) calculated by the Cockcroft-Gault formula. Baseline renal function was defined in accordance with the Kidney Disease: Improving Global Outcomes (KDIGO) guidelines. The Martini's nomogram was used preoperatively to estimate the risk of >25% postoperative eGFR decline; Surgical outcomes were evaluated in accordance with trifecta and pentafecta criteria.
A total of 103 patients were included (OPN: 63; RAPN: 40). The median follow-up was 77 (65-87) months. Median warm ischemia time was significantly lower in the OPN group (20 vs. 27.5 min, p < 0.001). Trifecta and pentafecta achievement rates were higher in the OPN group (65% vs. 25%, p < 0.001; 30.1% vs. 10%, p < 0.05, respectively). Martini's nomogram showed good discrimination in OPN (area under the curve (AUC) = 0.87) and RAPN (AUC = 0.80). Calibration analyses indicated overestimation in the OPN high-risk stratum, whereas the RAPN high/very-high strata were consistent with predictions.
In this retrospective cohort, OPN was associated with higher trifecta and pentafecta achievement than RAPN. The Martini's nomogram showed good discrimination but procedure-dependent calibration: Strata-level predictions aligned in RAPN, whereas risk was overestimated in the OPN high-risk stratum. These findings support cautious use for risk ranking and underscore the need for procedure-specific recalibration and further external validation, particularly for OPN.
We retrospectively reviewed patients who underwent OPN or RAPN between 2017 and 2021. Renal function was assessed pre- and postoperatively using estimated glomerular filtration rate (eGFR) calculated by the Cockcroft-Gault formula. Baseline renal function was defined in accordance with the Kidney Disease: Improving Global Outcomes (KDIGO) guidelines. The Martini's nomogram was used preoperatively to estimate the risk of >25% postoperative eGFR decline; Surgical outcomes were evaluated in accordance with trifecta and pentafecta criteria.
A total of 103 patients were included (OPN: 63; RAPN: 40). The median follow-up was 77 (65-87) months. Median warm ischemia time was significantly lower in the OPN group (20 vs. 27.5 min, p < 0.001). Trifecta and pentafecta achievement rates were higher in the OPN group (65% vs. 25%, p < 0.001; 30.1% vs. 10%, p < 0.05, respectively). Martini's nomogram showed good discrimination in OPN (area under the curve (AUC) = 0.87) and RAPN (AUC = 0.80). Calibration analyses indicated overestimation in the OPN high-risk stratum, whereas the RAPN high/very-high strata were consistent with predictions.
In this retrospective cohort, OPN was associated with higher trifecta and pentafecta achievement than RAPN. The Martini's nomogram showed good discrimination but procedure-dependent calibration: Strata-level predictions aligned in RAPN, whereas risk was overestimated in the OPN high-risk stratum. These findings support cautious use for risk ranking and underscore the need for procedure-specific recalibration and further external validation, particularly for OPN.
Authors
Çitgez Çitgez, Gültekin Gültekin, Şimşekoğlu Şimşekoğlu, Demirbilek Demirbilek, Kalender Kalender, Ercili Ercili, Okur Okur, Demirdağ Demirdağ, Önal Önal
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