![]() Conclusionīy using 3D-CT analysis to examine sphericity, we showed that metastatic lymph nodes became spherical. For lymph nodes with a short-axis diameter ≥ 5 mm, sphericity ≥ 0.60 identified metastasis with 84.1% sensitivity and 89.3% specificity. 0.60, p < 0.001) than those of nonmetastatic lymph nodes. ![]() Metastatic lymph nodes had a larger short-axis diameter (average: 8.2 mm vs. Each parameter was obtained and evaluated for ability to predict metastasis. The sphericity of the dissected station lymph nodes, which represents how close the node is to being a true sphere, was evaluated along with the diameter and volume. We reviewed the cases of 66 patients with N2 disease and of 68 patients with N0-1 disease who underwent lobectomy with mediastinal dissection between January 2012 and December 2021. We introduced sphericity as a criterion for evaluating morphologic differences between metastatic and nonmetastatic nodes. ![]() Although prevalently used, evaluation of lymph nodes is not always reliable. ![]() The presence of mediastinal lymph node metastasis is important because it is related to the treatment and prognosis of lung cancer. ![]()
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