Laparoscopic management of indeterminate renal cysts

Area of Science:

• Urology
• Oncology
• Minimally Invasive Surgery

Background:

• Indeterminate renal cysts require accurate diagnosis to guide treatment.
• Laparoscopic techniques offer a minimally invasive approach for renal cyst evaluation.
• Concerns exist regarding potential complications like seeding and recurrence with laparoscopic biopsy of renal cell carcinoma.

Purpose of the Study:

• To evaluate the outcomes of patients with indeterminate renal cysts initially assessed laparoscopically.
• To determine the incidence of tract seeding, local recurrence, and distant metastases in patients with cystic renal cell carcinoma diagnosed and treated following laparoscopic evaluation.
• To assess the safety and efficacy of laparoscopic biopsy for cystic renal cell carcinoma.

Main Methods:

• Thirty-five patients with indeterminate renal cysts underwent laparoscopic evaluation.
• Cysts were aspirated, fluid sent for cytology, and the cyst floor biopsied under direct laparoscopic visualization.
• Patients diagnosed with cystic renal cell carcinoma underwent immediate or delayed partial/radical nephrectomy; follow-up included imaging and physical examinations.

Main Results:

• Five out of 35 patients (14%) were diagnosed with cystic renal cell carcinoma.
• No evidence of local recurrence or distant metastases was observed during the average 20.2-month follow-up period.
• All follow-up examinations, including imaging (chest x-ray, abdominal CT), were negative for malignancy.

Conclusions:

• Initial laparoscopic evaluation of complex renal cysts can prevent unnecessary open surgeries.
• Laparoscopic biopsy of cystic renal cell carcinoma followed by surgical intervention appears safe, with no increased risk of peritoneal seeding, tract recurrence, or distant metastases.
• While preliminary results are encouraging, long-term follow-up is essential to fully validate these findings.