Smith Theodore R, Grigoropoulos Jerry
Department of Radiology, Albert Einstein College of Medicine, 1825 Eastchester Road, Bronx, New York, NY 10461,
Clin Imaging. 2002 Jan-Feb;26(1):18-22. doi: 10.1016/s0899-7071(01)00358-8.
The objective of this study was primarily to determine the incidence of the cisterna chyli (CC) on computed tomography (CT). Its radiologic characteristics were also evaluated. Retrospective review of 403 randomly chosen CT cases was made. All patients received intravenous contrast. Note was made of incidence, location, size, attenuation values, slice thickness, age, sex, and the presence or absence of malignancy or adenopathy. There were seven cases of demonstrated CC (1.7%). It was variably located at the L2 to T11 levels; average attenuation was 4 H and average size was 7.4 mm AP by 7.0 mm in transverse diameter with rounded to elliptical shape. Average length of CC was 1.5 mm. Malignant primary was present in four of the seven cases, and none of the seven had adenopathy. There were three males and four females; average age of the CC group was 55.5 years. Visualization of the CC on CT is not rare (1.7%); as previously reported, it should be distinguished from retrocrural adenopathy by its low water attenuation, anatomic continuity with the thoracic duct, tubular nature, and lack of intravenous contrast enhancement.
本研究的主要目的是确定乳糜池（CC）在计算机断层扫描（CT）上的发生率。还评估了其放射学特征。对403例随机选择的CT病例进行回顾性分析。所有患者均接受静脉造影剂注射。记录发生率、位置、大小、衰减值、层厚、年龄、性别以及是否存在恶性肿瘤或淋巴结病。发现7例乳糜池（1.7%）。其位置多变，位于L2至T11水平；平均衰减为4 H，平均大小为前后径7.4 mm，横径7.0 mm，呈圆形至椭圆形。乳糜池平均长度为1.5 mm。7例中有4例存在原发性恶性肿瘤，7例均无淋巴结病。有3例男性和4例女性；乳糜池组的平均年龄为55.5岁。CT上乳糜池的显影并不罕见（1.7%）；如先前报道，应通过其低水样衰减、与胸导管的解剖连续性、管状性质以及缺乏静脉造影剂增强来将其与膈脚后淋巴结病区分开来。
