Introduction : Minimal invasive liver resection is a challenging procedure. However, the robotic surgery system enable to minimal invasive liver resection even for beginners.

Methods : From August 2016 to November 2019, 22 consecutive patients underwent robotic hepatectomy in our hospital. Among them, right hepatectomy was the most common with 8 cases, followed by left hepatectomy was 7 cases. And the remaining caudate lobectomy, central bisectionectomy, segmentectomy (S4), ALPPS, left lateral sectionectomy combined segmentectomy (S6), right inferior sectionectomy (S5,6) combined wedge resection (S4), right posterior sectionectomy combined wedge resection (S2) were performed in one case each using robotic surgical system (the da Vinci Xi® Surgical System (Intuitive Surgical®, Sunnyvale, CA)). We investigate of short term perioperative outcomes for feasibility and safety of robotic liver resection.

Results : 12 patients were female and the rest were male. The mean patient age was 57.65±10.153 (34-75). And 10 patients were diagnosed hepatocellular carcinoma (HCC), three were intrahepatic duct (IHD) stone, two were liver metastasis and MCN-liver. And biliary cystadenoma, cavernous hemangioma, IPNB-with high grade intraepithelial neoplasm were diagnosed in one case each. And the mean operation time was 457.6 ± 131.596 (238-694) minutes and the mean estimated blood loss was 455.5 ± 564.041 (30-2600) ml and there was only one transfusion case. And mean length of hospital stay was 7.3 ± 1.525 (5-10) days. There was no major complication other than six grade I-II complications such as pleural effusion or abdominal fluid collection.

Conclusions : Robotic liver resection seems to be feasible and can be safely performed by beginners at