1991/08/01 by R.E. Dorfman, M. Alpern, BH Gross +1 · 349 citations
Medicine · #Hepatocellular Carcinoma Treatment and Prognosis #Radiomics and Machine Learning in Medical Imaging #Lung Cancer Diagnosis and Treatment #Medicine #Porta hepatis #Paraaortic lymph nodes #Lymph #Lymph node #Nuclear medicine #Radiology #Anatomy #Pathology #Cancer
paper · doi:10.1148/radiology.180.2.2068292
published in Radiology 180(2), 319-322 (Radiological Society of North America)
openalex publication_date 1991/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
Reports of the upper limits of normal for lymph node size at abdominal computed tomography have varied from 6 to 20 mm. Establishment of an upper limit for node size by specific location, analogous to that which has been reported for mediastinal lymph nodes, was sought. Short-axis diameters of the lymph nodes were measured in 130 patients who were not likely to have enlarged abdominal lymph nodes. Seven locations were defined, and the largest nodal measurement for each was recorded. Histographic analysis and nonparametric statistical methods were used to determine threshold values for the maximum node size in each region. The upper limits of normal by location were as follows: retrocrural space, 6 mm; paracardiac, 8 mm; gastrohepatic ligament, 8 mm; upper paraaortic region, 9 mm; portacaval space, 10 mm; porta hepatis, 7 mm; and lower paraaortic region, 11 mm. Lower paraaortic lymph nodes larger than 11 mm by short-axis measurement are abnormal. In other locations, nodes smaller than 1 cm may be abnormal if the determined thresholds are exceeded.