Gollub M J, Castellino R A
Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
Radiology. 1996 May;199(2):477-80. doi: 10.1148/radiology.199.2.8668798.
To determine the normal appearance of the cisterna chyli and how it may mimic an enlarged retrocrural lymph node on computed tomographic (CT) images.
CT scans were reviewed in 18 patients (17 with cancer, one with benign disease) who had tubular retrocrural structures of attenuation near that of water. The location, diameter, length, CT attenuation, duration of finding, change in size, and the status of intercurrent malignancy were recorded.
The cisterna chyli was variably located at T12-L1 (n=11), at T11-T12 (n=5), and at T-12 (n=2). The average length was 3 cm. The average CT attenuation was 12.5 HU. On serial scans in 14 patients, the average change in size was 2.2 mm despite progression or regression of malignant disease at other sites in 11 patients.
The cisterna chyli can mimic the appearance of an enlarged retrocrural lymph node. Proper identification depends on its characteristic location, tubular configuration, attenuation closer to that of water than soft tissue, and lack of substantial change in size despite changes in disease at other sites.
确定乳糜池的正常表现，以及在计算机断层扫描（CT）图像上它如何可能类似于增大的膈脚后淋巴结。
回顾了18例患者（17例患有癌症，1例患有良性疾病）的CT扫描，这些患者膈脚后有管状结构，其衰减接近水的衰减。记录其位置、直径、长度、CT衰减、发现的持续时间、大小变化以及并发恶性肿瘤的情况。
乳糜池的位置各异，位于T12-L1水平的有11例，位于T11-T12水平的有5例，位于T12水平的有2例。平均长度为3cm。平均CT衰减为12.5HU。在14例患者的系列扫描中，尽管11例患者其他部位的恶性疾病有进展或消退，但乳糜池大小的平均变化为2.2mm。
乳糜池可模仿增大的膈脚后淋巴结的表现。正确识别取决于其特征性位置、管状形态、比软组织更接近水的衰减以及尽管其他部位疾病有变化但其大小无明显改变。
