Magnusson A, Andersson T, Larsson B, Hagberg H, Sundström C H
Department of Diagnostic Radiology, Akademiska Sjukhuset, University of Uppsala, Sweden.
Acta Radiol. 1989 May-Jun;30(3):307-10.
Enlarged mediastinal, retroperitoneal and pelvic lymph nodes are often difficult to differentiate from vascular structures. Contrast medium is therefore used to help to discriminate arteries and veins from lymph nodes. This study was undertaken to investigate the degree to which pathologic lymph nodes become enhanced after an intravenous bolus injection of contrast medium. Computed tomography was performed in 25 patients with enlargement of retroperitoneal lymph nodes due to primary lympho-proliferative disease or metastases. A dynamic sequence of a well delineated lymph node was obtained over a period of two minutes. Contrast enhancement was seen in all lymph nodes, but of varying degree. The enhancement was correlated to that observed in the inferior vena cava. Most examined lymph nodes showed slight or moderate enhancement, but in five instances strong enhancement, more than 75 per cent of that of the vena cava, was found. These nodes could possibly have been misinterpreted as blood vessels.
纵隔、腹膜后和盆腔淋巴结肿大通常难以与血管结构区分开来。因此，使用造影剂来帮助区分动脉、静脉与淋巴结。本研究旨在探讨静脉推注造影剂后病理性淋巴结增强的程度。对25例因原发性淋巴增殖性疾病或转移导致腹膜后淋巴结肿大的患者进行了计算机断层扫描。在两分钟内获取了一个边界清晰的淋巴结的动态序列。所有淋巴结均可见造影剂增强，但程度不同。这种增强与在下腔静脉中观察到的增强相关。大多数检查的淋巴结显示轻度或中度增强，但在5例中发现有强烈增强，超过下腔静脉增强的75%。这些淋巴结可能被误诊为血管。
