Conversion to Radical Nephrectomy From Robotic Partial Nephrectomy Is Most Commonly Due to Anatomic and Oncologic...

Area of Science:

• Urology
• Surgical Oncology
• Robotic Surgery

Background:

• Partial nephrectomy is the standard for small renal masses.
• Increasing complexity of treated tumors raises concerns about conversion to radical nephrectomy.
• Robotic surgery is increasingly used for partial nephrectomy.

Purpose of the Study:

• To evaluate the incidence and reasons for conversion from robotic partial nephrectomy to radical nephrectomy.
• To analyze factors associated with conversion in patients undergoing robotic partial nephrectomy.
• To assess decision-making in conversion cases within the MUSIC collaborative.

Main Methods:

• Retrospective review of patients scheduled for robotic partial nephrectomy within the MUSIC collaborative.
• Stratification of patients based on completed procedure (partial vs. radical nephrectomy).
• Analysis of preoperative and intraoperative records for difficulty assessment and conversion reasons.

Main Results:

• A 4.2% conversion rate (27/650) from robotic partial to radical nephrectomy was observed.
• Conversions were primarily due to complex tumors (R.E.N.A.L. score ≥ 10) and oncologic concerns, not bleeding (19% of conversions).
• Converted cases involved larger tumors (4.7 vs. 2.8 cm) and higher rates of ≥ pT3 stage.

Conclusions:

• The rate of conversion from robotic partial to radical nephrectomy is low.
• Conversions are typically driven by tumor complexity and oncologic risk, not surgical complications like bleeding.
• Decision-making for conversion appears appropriate based on oncologic considerations.