Comparing the Perioperative and Oncological Outcomes of Open Versus Minimally Invasive Inguinal Lymphadenectomy in Penile Cancer: A Systematic Review and Meta-Analysis

摘要

Background: Long-term survival in penile cancer is dependent on the presence and extent of lymph node metastases. Historically, inguinal lymph node dissection (ILND) has been performed via an open approach (O-ILND). More recently, minimally invasive surgical alternatives (MIS-ILND) such as video-endoscopic and robot-assisted ILND have emerged. This review aims to compare the (1) perioperative outcomes, (2) complication rates, and (3) oncological efficacy between O-ILND and MIS-ILND. Methods: We conducted a PRISMA-compliant meta-analysis including studies comparing O-ILND versus MIS-ILND for penile cancer. Outcomes were pooled in random-effects meta-analyses. Results: Sixteen articles comprising 1054 patients were analysed. There was an observed trend towards longer operative time for the MIS-ILND approach (mean difference 28 min; 95% CI −2 to 58 min, p = 0.06), particularly with the robotic-assisted technique. Total LN yield (mean 12.3, mean difference 0.3, 95% CI −0.3 to 0.9, p = 0.13), and positive LN (RR 0.98, 95% CI 0.88–1.10, p = 0.75) were similar between groups. MIS-ILND significantly reduced complication rates for both minor (RR: 0.65, 95% CI 0.45–0.94, p = 0.02) and major complications (RR: 0.25, 95% CI 0.12–0.53, p = 0.002). Particularly, there was also lower wound infection rate with MIS-ILND (RR: 0.43, 95% CI 0.22–0.82, p = 0.02), corresponding to a shorter hospital stay of average 4 days (MD −4, 95% CI −6–−2, p = 0.05). Rates of skin/flap necrosis, lymphedema, lymphocele, and drainage time did not differ significantly. Local groin recurrence and overall survival did not differ between approaches. Conclusions: MIS-ILND is associated with fewer perioperative complications and shorter hospitalisation without compromising oncologic outcomes. These findings support its broader adoption, particularly in high-volume centres with appropriate surgical expertise.