三浦 義明¹, 黒田 英克¹, 葛西 和博¹, 近藤 公亮¹, 吉田 俊巳¹, 鈴木 一幸¹, 佐藤 俊一¹, 増田 友之², 植田 修³, 坂下 信夫⁴, 阿部 正⁵

Yoshiaki MIURA¹, Hidekatsu KURODA¹, Kazuhiro KASAI¹, Koryo KONDO¹, Toshimi YOSHIDA¹, Kazuyuki SUZUKI¹, Shunichi SATO¹, Tomoyuki MASUDA², Shu UEDA³, Nobuo SAKASHITA⁴, Tadashi ABE⁵

¹岩手医科大学第1内科, ²岩手医科大学第2病理 , ³岩手県立福岡病院第1内科 , ⁴岩手県立一戸病院外科 , ⁵岩手県立久慈病院外科

¹First Department of Internal Medicine Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka, 020-8505, Japan, ²Second Department of Pathology Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka, 020-8505, Japan, ³First Department of Internal Medicine Iwate Prefectural Fukuoka Hospital, 7-2 Ohata, Horino, Ninohe, 028-6105, Japan, ⁴Department of Surgery Iwate Prefectural Ichinohe Hospital, 55 Mukai, ichinohe, 028-5300, Japan, ⁵Department of Surgery Iwate Prefectural Kuji Hospital, 10-1 Asahi, Kuji, 028-8040, Japan

キーワード : Carcinoid tumor, Liver, Ultrasonography , Computed tomography , Angiography

A 53-year-old woman was hospitalized with a hepatic tumor that had been detected on health-screening ultrasonography. Laboratory data showed no marked findings: HBs-Ag and HCV-Ab were negative, and levels of serum AFP, PIVKA-II, CEA, and CA 19-9 were within their normal ranges. Ultrasonogram showed a hyperechoic circle concentric with and inside of a hypoechoic mass in the right hepatic lobe. The tumor appeared isodense with the surrounding liver in unenhanced CT, but enhanced CT showed a low density mass. A celiac arteriogram revealed a hypervascular tumor. The resected tumor measured 20×15 mm. Microscopic findings showed a carcinoid tumor that was positive for Grimelius stain. Further examination of the lung, gastrointestinal tract, and other organs found no primary carcinoid tumor. The patient has been well and free from tumor of the liver or elsewhere for the 7 years since her operation. We therefore considered this lesion to have been a primary carcinoid tumor of the liver. Only 14 cases of this disease have ever been reported in Japan. This report includes a review of the literature on the imaging of this rare tumor.