Background: The fluorescence properties of Indocyanine Green (ICG) make it a useful technique in the armamentarium of liver surgeons in order to enhance the visualization of anatomical structures by providing a real-time liver mapping. Methods: We have analyzed the impact of ICG-fluorescence staining technique in 40 consecutive patients who underwent robotic-assisted liver resection for malignancies from June 2014 to November 2017. Results: For the 55% of patients the surgical indication was colorectal liver metastasis followed by hepatocarcinoma in 35% of cases. The R0 resection rate was 100%, and the mean resection margin was 12 mm. Twenty percent of patients experienced tumor recurrence. The 1-year and 2-year overall survival rates were 91% and 84%, respectively. The 1-year and 2-year disease free survival were 77.2% and 65%, respectively. The previously marked transaction line was changed after the staining method in 12 out of 40 patients. Through intra-operative ultrasonography and white-light exploration of the liver surface 43 lesions were detected, whereas with the ICG-F 52 lesion of the liver surface were identified, including two superficial colorectal metastases missed at the intra-operative ultrasonography. Conclusion: The ICG-F is a promising navigational tool, that can potentially overcome the limitations of the minimally invasive liver surgery.
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