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Two-year analysis for predicting renal function and contralateral hypertrophy after robot-assisted partial

Dae Keun Kim1, Yujin Jang2, Jaeseon Lee2

  • 1Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea.

International Journal of Urology : Official Journal of the Japanese Urological Association
|September 3, 2015
PubMed
Summary

Robot-assisted partial nephrectomy impacts kidney function, with preoperative GFR predicting long-term outcomes. Contralateral kidney hypertrophy compensates for ipsilateral loss, influenced by tumor size and parenchymal volume reduction.

Keywords:
hypertrophykidneynephrectomyroboticssegmentation

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Area of Science:

  • Urology
  • Nephrology
  • Surgical Oncology

Background:

  • Robot-assisted partial nephrectomy (RARP) is a standard treatment for renal tumors.
  • Understanding long-term renal function and compensatory mechanisms post-RARP is crucial for patient management.

Purpose of the Study:

  • To analyze long-term renal function and parenchymal volume changes after RARP.
  • To identify predictors of renal function decline and contralateral renal hypertrophy post-RARP.

Main Methods:

  • 62 patients undergoing RARP had renal parenchymal volume assessed using 3D segmentation.
  • Evaluations included preoperative, 6-month, 1-year, and 2-year follow-ups.
  • Linear regression models identified factors predicting estimated glomerular filtration rate (eGFR) changes and contralateral hypertrophy.

Main Results:

  • Global eGFR decreased by -2.4% at 2 years post-RARP.
  • Ipsilateral kidney volume decreased by -21% at 2 years, while contralateral kidney volume increased by 12.9%.
  • Preoperative eGFR predicted global eGFR change; parenchymal volume loss rate and tumor size predicted contralateral hypertrophy.

Conclusions:

  • Preoperative eGFR is a key determinant of renal function post-RARP.
  • Contralateral renal hypertrophy effectively compensates for ipsilateral kidney volume and function loss.
  • Tumor size and parenchymal volume loss rate influence the degree of compensatory hypertrophy.