Upper abdominal lymph nodes: criteria for normal size determined with CT.

Abstract

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.

Diagnostic Accuracy of Multidetector Row Computed Tomography in T- and N Staging of Gastric Cancer With Histopathologic Correlation

“…13 Regional lymph nodes were considered to be involved when the short-axis diameter was 96 mm for perigastric lymph nodes and 98 mm for extraperigastric lymph nodes. 14,15 For N staging, the new TNM 5 and Japanese classifications 6 were independently used. In the new TNM classification, N stage was determined by the number of metastatic lymph nodes from a minimum yield of 15 total lymph nodes (N1, 1Y6 involved nodes; N2, 7Y15 involved nodes; and N3, 915 nodes).…”

Total body computed tomography scan in the initial work‐up of Binet stage A chronic lymphocytic leukemia patients: Results of the prospective, multicenter O‐CLL1‐GISL study

“…di Ematologia, Azienda Ospedaliera "Pugliese-Ciaccio", Catanzaro, Italy; 11 Divisione di Ematologia, Azienda Ospedaliera Papardo, Messina, Italy; 12 Unit a Operativa di Ematologia, A.O.S. Maria Nuova, Reggio Emilia, Italy; 13 Direzione Scientifica, IRCCS S. Martino-IST, Genova, Italy; 14 Dipartimento di Ematologia, Ospedale Santo Spirito, Pescara, Italy; 15 Divisione di Ematologia, Presidio Ospedaliero "A. Perrino", Brindisi, Italy; 16 Divisione di Ematologia e Trapianto di Midollo Osseo, Policlinico P. Giaccone, Palermo, Italy; 17 Unit a Operativa di Medicina Interna, Presidio Ospedaliero di Matera, Italy; 18 Unit a di Ematologia e Trapianto di Cellule Staminali, IRCCS-CROB, Rionero in Vulture, Italy;…”

Radiographic Findings of Primary B-Cell Lymphoma of the Stomach: Low-Grade Versus High-Grade Malignancy in Relation to the Mucosa-Associated Lymphoid Tissue Concept

“…The wall thickness measured on CT was divided into four groups according to the depth of invasion (mucosa, submucosa, muscle, and beyond serosa) on the histopathologic specimen, and the mean value of the wall thickness of each group was calculated. The presence of lymphadenopathy was determined using the size criteria established by Dorfman et al [20]. Accordingly, short-axis nodal diameters greater than 6 mm in the retrocrural space, 7 mm in the porta hepatis, 8 mm in the gastrohepatic ligament region, and 10 mm in all other sites were considered abnormal.…”