• Kunihito Gotoh, Terumasa Yamada, Osamu Ishikawa, Hidenori Takahashi, Hidetoshi Eguchi, Masahiko Yano, Hiroaki Ohigashi, Yasuhiko Tomita, Yasuhide Miyamoto, and Shingi Imaoka.
• Department of Surgery, Osaka Medical Center for Cancer and Cardiovascular Diseases, Nakamichi, Higashinari-ku, Osaka, Japan.
• J Surg Oncol. 2009 Jul 1; 100 (1): 75-9.

Background And ObjectivesThe clear delineation between tumor and normal tissue is ideal for real-time surgical navigation imaging. We present a novel indocyanine green (ICG) fluorescence imaging technique to visualize hepatocellular carcinoma (HCC).MethodsTen patients with solitary HCC underwent hepatectomy between February and September 2007 at Osaka Medical Center for Cancer and Cardiovascular Diseases. ICG had been injected intravenously several days before surgery at a dose of 0.5 mg/kg body weight. After laparotomy, the liver was inspected with intraoperative ultrasonography (IOUS), and then with a near-infrared (NIR) fluorescence imaging system (PDE; Hamamatsu Photonics K.K. Hamamatsu, Japan).ResultsAll the 10 primary tumors showed bright fluorescent signals and could be completely removed with negative margins under the guide of PDE. In four cases (40.0%), new HCC nodules that were not detected by use of any preoperative examinations including IOUS were detected by PDE. These newly identified HCC nodules were very small in size and most of the tumors were well-differentiated HCCs.ConclusionsThis novel technique is simple and safe, and is therefore considered to be a promising tool for routine intraoperative imaging during a hepatic resection and further clinical exploration for HCC.(c) 2009 Wiley-Liss, Inc.

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