丁子 清¹, 陳 敏華¹, 松岡 伸一¹, 小川 肇¹, 久保 公三¹, 長谷川 貴¹, 佐藤 幸彦¹, 佐藤 健誠², 入江 五朗¹

Kiyoshi CHOJI¹, Minhua CHEN¹, Shin'ichi MATSUOKA¹, Hajime OGAWA¹, Kozo KUBO¹, Takashi HASEGAWA¹, Yukihiko SATO¹, Kensei SATO², Goro IRIE¹

¹北海道大学医学部放射線医学教室, ²北海道社会福祉事業協会岩内病院内科

¹Department of Radiology, Hokkaido University School of Medicine, ²Department of Internal Medicine, Iwanai Kyokai Hospital

キーワード : Ultrasonic diagnosis, Liver neoplasms, Liver, Hemangioma cavernous

Two sets of US images of confirmed 27 hepatic hemangiomas in 20 cases were compaired. In one set, patients were treated by applying artificial pressure to the liver; in the other set, patients were treated without applying that pressure. Pressure was applied by (a) deep inhalation, (b) manual compression of the abdominal wall, or (c) a combination of both (a) and (b). Nine out of 17 hyperechoic hemangiomas, and two out of eight mixed-echo hemangiomas showed change in the echogenicity, while none of the two simply hypoechoic ones yielded no change in the echogenicity. The overall sensitivity was 41%. Even nodules smaller than 30 mm in diameter yielded change in echogenicity in 40%. This phenomenon, is thought to be specific to hemangioma as the authors had previously reported in the field of intraoperative sonography. The observation of this change in echogenicity is a good confirmatory method in the diagnosis of hepatic hemangiomas by routine ultrasonography.