The Efficacy And Safety Of Ultrasound-Guided Percutaneous Microwave Ablation For Small Liver Tumors Adjacent To Large Vessels

objective: To evaluate the feasibility ?efficacy and safety of percutaneous microwave ablation(MWA) for small liver tumors adjacent to large vessels.Methods: From March 2009 to July 2015, a total of 86 patients underwent ultrasound-guided percutaneous MWA, with pathologically proven or clinically diagnosed liver tumors measuring ?3 cm in diameter and located ?5 mm from a major vessel(n=94). Regular follow-up after MWA was performed to assess treatment efficacy and perioperative complications.Results: The complete relation rate one month after ablation was 93.3%(84/90). The 6-, 9-, 12-, 24-, 36-, 48-, 60-, 72-, 84-month local recurrence rate were 2.4%,2.4%,3.7%,6.6%,8.4%?8.4%?8.4%?8.4%?8.4%. Perioperative special complication rate was 5.32%(5/94), including 3 cases of moderate liver function damage, 2 cases of limited sub-capsular hematoma.Conclusion: Ultrasound-guided percutaneous MWA can be an important way of the treatment for the tumors located in the high-risk area, which has the merits of little liver trauma, excellent efficacy, safety with few complications, and shorter postoperative hospital stay.