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Conversion of Robot-assisted Partial Nephrectomy to Radical Nephrectomy: A Prospective Multi-institutional Study.

Sohrab Arora1, Brian Chun1, Rajesh K Ahlawat2

  • 1Vattikuti Urology Institute, Henry Ford Hospital, Detroit, MI.

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Summary
This summary is machine-generated.

Robot-assisted partial nephrectomy (RAPN) has a low conversion rate to radical nephrectomy. Higher body mass index (BMI) and Charlson comorbidity score predict conversion, not tumor characteristics.

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Area of Science:

  • Urology
  • Surgical Oncology
  • Robotic Surgery

Background:

  • Robot-assisted partial nephrectomy (RAPN) is increasingly used for kidney tumors.
  • Understanding conversion rates and predictors is crucial for surgical planning and patient counseling.

Purpose of the Study:

  • To determine the incidence of conversion from RAPN to radical nephrectomy.
  • To identify patient and tumor factors associated with conversion during RAPN.

Main Methods:

  • Analysis of 501 patients undergoing attempted RAPN from the Vattikuti Collaborative Quality Initiative database (Nov 2014 - Feb 2017).
  • Intention-to-treat analysis was performed.
  • Multivariable logistic regression identified independent predictors of conversion.

Main Results:

  • The overall conversion rate was 5% (25/501 patients).
  • Converted patients were older, had higher BMI, and higher comorbidity scores (Charlson and ASA).
  • Independent predictors for conversion were BMI (OR 1.070) and Charlson score (OR 1.459). Tumor factors were not significant predictors.

Conclusions:

  • RAPN demonstrates a low conversion rate to radical nephrectomy.
  • Patient factors, specifically BMI and comorbidity burden (Charlson score), are key predictors of conversion.
  • Tumor characteristics like stage, location, multifocality, and RENAL score do not significantly influence conversion risk.