Pritzker School of Medicine, The University of Chicago, Chicago, IL, USA.
Department of Radiology, The University of Chicago, 5841 S Maryland Avenue, Chicago, IL, 60637, USA.
Surg Radiol Anat. 2020 Sep;42(9):1109-1112. doi: 10.1007/s00276-020-02494-8. Epub 2020 May 14.
The goal of this study is to characterize the normal size of parotid lymph nodes among healthy adult patients on CT.
This was a single-center retrospective observational study of 543 patients who underwent maxillofacial CT scans between January 2019 and July 2019. The long and short axis diameters of the largest lymph nodes in the bilateral superficial parotid glands were measured.
Among the 543 patients, 407 subjects with a mean age of 47.0 ± 18.4 years had a total of 719 detectable intraparotid lymph nodes. The mean patient age was 47.0 ± 18.4 years. Of all 719 measured intraparotid lymph nodes, the measured long and short axis diameter means were 4.4 ± 1.4 mm and 3.3 ± 1.1 mm, respectively. In our study, 96% (689/719) of all lymph nodes had a long axis diameter of 7 mm or less and 93% (671/719) of all lymph nodes had a short axis diameter of 5 mm or less. Younger patients had significantly larger lymph nodes than older patients in both long axis (4.5 vs 4.3 mm; P = 0.03) and short axis (3.4 vs 3.1 mm, P = 0.01) measurements.
Our findings suggest 5 mm as an upper limit of normal for the short axis diameter of superficial intraparotid lymph nodes.
本研究旨在描述 CT 检查中健康成年患者腮腺内正常淋巴结的大小。
这是一项单中心回顾性观察性研究，共纳入 543 例于 2019 年 1 月至 2019 年 7 月间接受颌面 CT 扫描的患者。测量双侧腮腺浅叶内最大淋巴结的长轴和短轴直径。
在 543 例患者中，407 例年龄 47.0±18.4 岁的患者共有 719 个可检测到的腮腺内淋巴结。患者平均年龄为 47.0±18.4 岁。在所有 719 个测量的腮腺内淋巴结中，测量的长轴和短轴直径平均值分别为 4.4±1.4mm 和 3.3±1.1mm。在本研究中，96%（689/719）的所有淋巴结长轴直径均小于 7mm，93%（671/719）的所有淋巴结短轴直径均小于 5mm。长轴（4.5 对 4.3mm；P=0.03）和短轴（3.4 对 3.1mm，P=0.01）测量中，年轻患者的淋巴结均显著大于年长患者。
我们的研究结果提示，5mm 可作为腮腺内浅表淋巴结短轴直径的正常上限。
