栃尾 人司¹, 冨田 周介², 工藤 正俊³, 岩崎 信広¹, 田村 周二¹, 中村 仁美¹, 曽我 登志子¹, 福永 豊和², 岡部 純弘², 樫田 博史², 平佐 昌弘², 伊吹 康良², 森本 義人¹, 織野 彬雄²

Hitoshi TOCHIO¹, Syusuke TOMITA², Masatoshi KUDO³, Nobuhiro IWASAKI¹, Syuji TAMURA¹, Hitomi NAKAMURA¹, Toshiko SOGA¹, Toyokazu FUKUNAGA², Yoshihiro OKABE², Hiroshi KASHIDA², Masahiro HIRASA², Yasuyosi IBUKI², Yoshito MORIMOTO¹, Akio ORINO²

¹神戸市立中央市民病院臨床病理科, ²神戸市立中央市民病院消化器センター内科, ³近畿大学医学部消化器内科

¹Division of Abdominal Ultrasound Kobe City General Hospital, 4-6 Minatojima-Nakamachi, Chuo-ku, Kobe-shi, Hyogo-ken 650-0046, Japan, ²Department of Gastroenterology Kobe City General Hospital, 4-6 Minatojima-Nakamachi, Chuo-ku, Kobe-shi, Hyogo-ken 650-0046, Japan, ³Division of Gastroenterology and Hepatoloqy, Department of Internal Medicine Kinki University School of Medicine, 377-2, Ohno-Higashi, Osaka-Sayama, Osaka, Japan 589-8511

キーワード : Early hepatocellular carcinoma, Borderline lesion , Draining vessel, Hepatic vein , Ultrasound, Color Doppler

We performed waveform analysis of the efferent signal detected within early hepatocellular carcinomas and borderline lesions, in which portal flow was demonstrated. Continuity of this flow in the existing vessel was also analyzed. Nine nodules in 7 patients with early hepatocellular carcinomas and borderline lesions were included in this study. Tumor diameter ranged from 1.2 to 3.5 cm; average, 2.1 cm. Waveform of the efferent flow signal from within these nodules was continuous in 5 nodules and biphasic venous in 4 nodules. Outside the nodules, the waveform of the efferent flow signal was that of a biphasic venous wave. All efferent signals were confirmed to continue in the hepatic vein. These findings thus suggest that the draining vessel in early hepatocellular carcinomas and their borderline lesions is the hepatic vein.