Chuang V P, Lorman J G
Radiology. 1977 May;123(2):315-8. doi: 10.1148/123.2.315.
The "halo sign" in hepatic angiography is considered a reliable sign of an intrahepatic mass. A large retroperitoneal mass may present as an hepatic tumor clinically; two such cases are presented in which the halo sign was demonstrated by hepatic angiography. When this "paradoxical" halo sign is present, several factors contribute to the diagnosis of an extra-hepatic mass: (a) minimal stretching or displacement of the hepatic artery or portal vein; (b) lack of draping of the hepatic arteries around the mass; and (c) identification of abnormal vessels or a mass in an adjacent organ.
肝血管造影中的“晕征”被认为是肝内肿块的可靠征象。巨大的腹膜后肿块在临床上可能表现为肝肿瘤；本文报告两例经肝血管造影显示有晕征的病例。当出现这种“矛盾性”晕征时，有几个因素有助于肝外肿块的诊断：(a)肝动脉或门静脉的拉伸或移位最小；(b)肿块周围无肝动脉包绕；(c)在相邻器官中发现异常血管或肿块。
