Carcinological Risks and Retroperitoneal Laparoscopy

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Purpose: To determine the incidence of trocar site spillage, local recurrence, and metastatic disease associated with retroperitoneal laparoscopic tumor resection.Methods: From 1994 to 1999, 228 retroperitoneal laparoscopic procedures were performed at our institution. Fifty–six procedures (24.6%) were for malignancies and comprised 41 radical nephrectomies and 8 partial nephrectomies for renal tumors, and 7 nephro–ureterectomies for renal pelvis tumors. The pathological stage and the status of surgical margins were noted according to the 1997 TNM classification. Postoperative follow–up data were obtained by means of physical and radiological examinations after 1 and 3 months, and then half–yearly. Trocar site seeding, local recurrence and metastatic disease were recorded. Kaplan–Meier actuarial analysis was used to determine the disease–free survival likelyhood.Results: The mean follow–up was 24.9±13.85 months. All the patients had tumor–free surgical margins. No laparoscopic trocar site recurrences were identified. For laparoscopic radical nephrectomy: one patient had a local recurrence with hepatic metastasis of a pT₃G₂ tumor after 9 months and died 19.7 months after the procedure. One patient with a pT_3aG₃M+ tumor died 23.1 months after radical nephrectomy without any sign of local recurrence. For laparoscopic nephro–ureterectomy: one patient with a pT₃G₃ tumor had a local recurrence 12.1 months after the procedure and died 26.6 months after surgery. One patient with a pT₁G₂ renal pelvis tumor had bone metastasis at 9 months and died 29 months after the procedure. The Kaplan–Meier actuarial disease–free survival rate was 91% at 54 months for radical nephrectomy, 61% at 30 months for nephro–ureterectomy and 100% at 49 months for partial nephrectomy.Conclusion: Malignancies of the upper urinary tract can be managed by means of retroperitoneal laparoscopy. Short–term results suggest that this procedure is not associated with an increased risk of portsite or local recurrence, and that disease–free survival is equivalent to that obtained with open surgery.