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Updated: Feb 14, 2026

Direct Drug Delivery to Kidney via the Renal Artery
Published on: April 17, 2021
[Standard surgery for small renal masses (<4 cm)]
S K Frees1, R Mager2, H Borgmann2
1Klinik und Poliklinik für Urologie und Kinderurologie, Universitätsmedizin Mainz, Langenbeckstr. 1, 55131, Mainz, Deutschland. sebastian.frees@unimedizin-mainz.de.
Background:
Several new treatment strategies have emerged in the treatment of small renal masses (<4 cm in diameter). Active surveillance and ablative techniques have been introduced but it remains unclear which patients will benefit the most from these new treatment options. A surgical approach remains standard of care. In recent decades, radical nephrectomy has been replaced by nephron-sparing surgery for the management of small renal masses.
Results:
In addition to the open partial nephrectomy, which is considered the standard approach, the number of surgeries performed using minimally invasive techniques is increasing. Recent data show that there might be some benefits such as less blood loss. The disadvantages shown by laparoscopic partial nephrectomy such as prolonged warm ischemia, longer operation times, and postoperative renal impairment might be negligible for the robotic approach. Therefore, current guidelines allow these approaches in addition to open partial nephrectomy if sufficient surgical expertise is given.
Insights
Minimally invasive partial nephrectomy, including robotic approaches, is increasingly used for small renal masses. These techniques may offer benefits over open surgery, with robotic surgery potentially overcoming laparoscopic disadvantages.
Area of Science:
- Urology
- Surgical Oncology
Background:
- Small renal masses (<4 cm) have new treatment options beyond surgery.
- Active surveillance and ablative techniques are available, but patient selection is key.
- Nephron-sparing surgery has replaced radical nephrectomy for small renal masses.
Purpose of the Study:
- To evaluate the role and outcomes of minimally invasive partial nephrectomy for small renal masses.
- To compare minimally invasive techniques with open partial nephrectomy.
- To determine the suitability of robotic partial nephrectomy over laparoscopic approaches.
Main Methods:
- Review of recent surgical data comparing open, laparoscopic, and robotic partial nephrectomy.
- Analysis of outcomes including blood loss, ischemia time, operation duration, and renal function.
- Assessment of current guideline recommendations for surgical management.
Main Results:
- Minimally invasive partial nephrectomy, particularly robotic, is increasingly adopted.
- Robotic partial nephrectomy may mitigate disadvantages associated with laparoscopic techniques, such as prolonged ischemia and renal impairment.
- Benefits like reduced blood loss are observed with minimally invasive approaches.
Conclusions:
- Minimally invasive partial nephrectomy is a viable alternative to open surgery for small renal masses.
- Robotic partial nephrectomy shows promise in overcoming laparoscopic limitations.
- Guidelines support these approaches when surgical expertise is available.
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