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BACKGROUND: Ablation is an effective, parenchymal-sparing treatment for primary liver cancer and liver metastases. The purpose of this study was to report our initial experience with laparoscopic microwave ablation regarding postoperative complications, rate of conversions to open procedure, and technical efficacy. METHODS: This was a quality improvement project carried out at a tertiary care center in Denmark. Patients ≥ 18 years old with liver malignancies, not available for percutaneous ablation, and treated with ultrasound-guided laparoscopic ablation were included. RESULTS: From March 2023 to December 2023, 39 patients were referred for laparoscopic ablation after a multidisciplinary team conference. Of these, two procedures were converted to open procedures due to adhesion and tumor progression. Three patients rejected the sharing of medical information, two procedures were canceled and in one case the strategy was changed perioperatively. Therefore, 32 procedures in 31 patients were available for analysis. Complete ablation was evaluated after 1 month and was achieved in 100% of the procedures. None of the patients died, and no complications were reported in 21 cases (65.6%). Most patients with complications had a grade 1 complication based on the Clavien-Dindo classification, which among others included abdominal and shoulder pain, atrial fibrillation, and subcutaneous hematoma. Two patients had a complication grade 2 (wound infection and decompensated cirrhosis) and one had a grade 4b (sepsis due to pneumonia and urinary tract infection). The median Comprehensive Complication Index was 12.2 (interquartile range 8.7-24.2). Furthermore, univariable logistic regression showed that ≥ 2 tumors treated were associated with a higher risk of complications (odds ratio 6.37, 95% confidence interval [1.20;33.85], p-value = 0.0297). CONCLUSION: Ultrasound-guided laparoscopic microwave ablation of liver malignancies is feasible and safe with little risk for complications, a high technical efficacy, and a low rate of conversions to open procedures.
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INTRODUCTION: Despite limited evidence, technique efficacy and complications may be important short-term outcomes after ablation for hepatocellular carcinoma (HCC). We aimed to report these outcomes after ablation as the first surgical intervention for HCC. METHODS: This nationwide cohort study was based on data from the Danish Liver and Biliary Duct Cancer Database and medical records. Variables associated with outcomes were investigated using logistic regression. RESULTS: From 2013 to 2023, 433 patients were included of which 79% were male, 73% had one tumor, and 90% had cirrhosis. Complete ablation was achieved after percutaneous, laparoscopic, and open approach in 84%, 100%, and 96% of the procedures, respectively. Most patients did not experience complications (76%). Open ablation compared with percutaneous was associated with higher risk of complications in multivariable adjusted analysis (Clavien-Dindo grade 2-5 (odds ratio 5.34, 95% confidence interval [2.36; 12.08]) and 3B-5 (5.70, [2.03; 16.01]), and lower risk of incomplete ablation (0.19 [0.05; 0.65]). Number of tumors ≥3 was associated with a higher risk of incomplete ablation (3.88, [1.45; 10.41]). Tumor diameter ≥3 cm was associated with increased risk of complications grade 2-5 (2.84, [1.29; 6.26]) and 3B-5 (4.44, [1.62; 12.13]). Performance status ≥2 was associated with risk of complications grade 3B-5 (5.98, [1.58; 22.69]). Tumor diameter was not associated with technique efficacy. CONCLUSION: Open ablation had a higher rate of complete ablation compared with percutaneous but was associated with a higher risk of complications. Tumor diameter ≥3 cm and performance status ≥2 were associated with a higher risk of complications.