López-Machado E, Mallorquín-Jiménez F, Medina-Benítez A, Ruiz-Carazo E, Cubero-García M
Department of Radiology, Hospital Comarcal del Noroeste de la Región de Murcia, Caravaca de la Cruz, Spain.
Eur J Radiol. 1998 Jan;26(2):210-4. doi: 10.1016/s0720-048x(96)01146-1.
The retrospective study of aneurysms of the portal venous system and their possible aetiology, using different imaging methods.
Between 1992 and 1995 we collected 13 cases of portal vein aneurysm from 11 patients, eight of whom suffered portal hypertension (PH) secondary to hepatic cirrhosis. All were diagnosed by means of ultrasonography (155) and/or computed tomography (CT). The aneurysms were defined as fusiform expansions when in the main portal vein and its branches or as cystic lesions with internal flow when in the intrahepatic branches.
Ten of the aneurysms (76.9%) were in the extrahepatic portal venous system and three (23.1%) in intrahepatic branches. Of the extrahepatic aneurysms, the two most common locations were the main portal vein and the confluence of superior mesenteric and splenic veins (30.7% each site). The largest were generally those at the confluence (37.6+/-9.7 mm maximum diameter).
Aneurysms in the portal system can be congenital or acquired. Although their aetiology is uncertain, we found a clear relation to PH syndrome; of 13 aneurysms in the study, eight were related to this disease. PH should be suspected in the evaluation of portal aneurysms.
采用不同成像方法对门静脉系统动脉瘤及其可能病因进行回顾性研究。
1992年至1995年间，我们从11例患者中收集了13例门静脉瘤病例，其中8例患有继发于肝硬化的门静脉高压（PH）。所有病例均通过超声检查（155）和/或计算机断层扫描（CT）诊断。当动脉瘤位于门静脉主干及其分支时定义为梭形扩张，当位于肝内分支时定义为有内部血流的囊性病变。
10例动脉瘤（76.9%）位于肝外门静脉系统，3例（23.1%）位于肝内分支。在肝外动脉瘤中，两个最常见的部位是门静脉主干和肠系膜上静脉与脾静脉汇合处（各占30.7%）。最大的动脉瘤通常位于汇合处（最大直径37.6±9.7mm）。
门静脉系统动脉瘤可为先天性或后天性。尽管其病因尚不确定，但我们发现与PH综合征有明确关联；在本研究的13例动脉瘤中，8例与该疾病有关。在评估门静脉瘤时应怀疑存在PH。
