Abstract
Renal cyst is a common disease in humans and laparoscopic renal cyst decortication is the gold standard for treatment. However, specialized surgical skills are required for the treatment of renal parapelvic cysts. In this study, we describe an improved laparoscopic method for the treatment of renal parapelvic cysts involving the use of continuous infusion of methylene blue. Sixteen patients with renal parapelvic cyst were enrolled in this study. All patients underwent retrograde ureteral catheterization, with continuous perfusion of the renal pelvis using a solution of 0.2% methylene blue and saline, during laparoscopic decortication of the parapelvic cyst. In one patient, the cyst communicated with the renal collection system which was injured, but this was immediately repaired intraoperatively. All operations were successful, and none was converted to open surgery. There were no occurrences of persistent urinary fistula, bleeding, or other complications postoperatively. All patients were followed-up for 3–24 months, and results of postoperative imaging investigations revealed that all of our patients experienced either complete recovery or a greater than 50% decrease in size of the cysts. Our study demonstrates that methylene blue-assisted laparoscopic treatment is a safe, effective and practical method for the treatment of renal parapelvic cysts.
Highlights
Renal cyst is a common disease in humans and laparoscopic renal cyst decortication is the gold standard for treatment
We used methylene blue to aid in distinguishing the cysts from the renal collection system, in order to find and repair the damaged collection system quickly during surgery, to avoid postoperative urinary fistula or secondary surgery, and to achieve other results, as described below
Between May 2017 and December 2019, a total of 115 cases of renal cysts were treated, comprising 16 cases of renal parapelvic cysts (13.9%) that were included in this study
Summary
Renal cyst is a common disease in humans and laparoscopic renal cyst decortication is the gold standard for treatment. We describe an improved laparoscopic method for the treatment of renal parapelvic cysts involving the use of continuous infusion of methylene blue. Our study demonstrates that methylene blue-assisted laparoscopic treatment is a safe, effective and practical method for the treatment of renal parapelvic cysts. Studies on how to identify the relationship between cysts and the collecting system during surgery in order to reduce the incidence of damage to the renal collecting system, are currently rare. We used methylene blue to aid in distinguishing the cysts from the renal collection system, in order to find and repair the damaged collection system quickly during surgery, to avoid postoperative urinary fistula or secondary surgery, and to achieve other results, as described below
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