Esser Jan-Paul, Oei H Yoe, de Bruin Hein G, Krenning Eric P
Erasmus MC, Department of Nuclear Medicine, Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands.
Clin Nucl Med. 2004 Dec;29(12):793-4. doi: 10.1097/00003072-200412000-00004.
An unusual phenomenon during lung scintigraphy is presented. Besides visualization of the lungs, accumulation of Tc-99m macroaggregated albumin (MAA) was seen in a small part of the liver and in and around several thoracic vertebrae. Contrast-enhanced radiographic computed tomography revealed extensive collateral pathways, which were caused by a partially obstructed superior vena cava. Shunting of systemic venous blood flow through chest wall veins to the portal system was responsible for accumulation of MAA in the liver. Retrograde blood flow through dilated thoracic vertebral veins resulted in visualization of the bone marrow.
本文呈现了肺闪烁扫描过程中的一种异常现象。除肺部显影外，在肝脏的一小部分以及几个胸椎及其周围可见到99m锝标记的大颗粒白蛋白（MAA）的聚集。对比增强的X线计算机断层扫描显示存在广泛的侧支循环通路，这是由上腔静脉部分阻塞所致。体循环静脉血经胸壁静脉分流至门静脉系统导致MAA在肝脏中聚集。经扩张的胸椎静脉的逆向血流导致骨髓显影。
