Does the Simple Renal Cyst Treatment Improve Renal Function: A Pilot Study

Area of Science:

• Nephrology
• Urology
• Surgical Science

Background:

• Large simple renal cysts (SRCs) can impact renal function.
• Surgical intervention for SRCs is common, but its effect on renal function is not well-established.
• This study investigates the impact of laparoscopic cyst unroofing on renal function in patients with large SRCs.

Purpose of the Study:

• To evaluate the effect of laparoscopic simple renal cyst (SRC) surgery on renal function.
• To assess changes in plasma creatinine, estimated glomerular filtration rate (GFR), and 24-hour urinary parameters post-surgery.
• To determine if improvements in renal parenchymal thickness correlate with changes in renal function.

Main Methods:

• A case-series study involving 22 patients with SRCs larger than 50 mm.
• Laparoscopic cyst unroofing surgery was performed.
• Renal function was assessed by measuring plasma creatinine, estimated GFR, and 24-hour urinary protein, creatinine, and volume before and 1 month after surgery.
• Renal parenchymal thickness was measured using CT scans before and after surgery.

Main Results:

• No significant differences were observed in plasma creatinine or estimated GFR before and after surgery.
• 24-hour urinary volume, creatinine, and protein showed no significant changes post-surgery.
• A statistically significant improvement in renal parenchymal thickness was noted after surgery (10.4 ± 0.7 mm, P=0.001).
• The improvement in parenchymal thickness did not correlate with changes in estimated GFR (r=0.349, P=0.13).

Conclusions:

• Laparoscopic unroofing of large simple renal cysts can lead to noticeable recovery of renal parenchymal thickness.
• The surgery did not result in significant improvements in overall renal function.
• Observation may be a safe and viable treatment strategy for large SRCs, without compromising renal function.