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  • Title: Positron emission tomography/computed tomography as a clinical diagnostic tool for anterior mediastinal tumors.
    Author: Watanabe T, Shimomura H, Mutoh T, Saito R, Goto R, Yamada T, Notsuda H, Matsuda Y, Noda M, Sakurada A, Taki Y, Okada Y.
    Journal: Surg Today; 2019 Feb; 49(2):143-149. PubMed ID: 30198048.
    Abstract:
    PURPOSE: The purpose of this study was to assess the usefulness of positron emission tomography/computed tomography (PET/CT) in the differential diagnosis of anterior mediastinal tumors. METHODS: A total of 94 patients with anterior mediastinal masses or nodules (male, n = 41; female, n = 53; age, 17-84 years) were retrospectively evaluated. All patients were evaluated by PET/CT and the masses or nodules were histologically diagnosed in our institution. RESULTS: Anterior mediastinal masses and nodules were classified into two disease categories: Low (thymic hyperplasia, thymoma, mature teratoma, and MALT lymphoma) and High (thymic carcinoid, thymic cancer, diffuse large B-cell lymphoma, T-cell lymphoblastic lymphoma, Hodgkin's lymphoma, and malignant germ cell tumors) groups. The sensitivity and specificity of maximum standardized uptake value (SUVmax) 7.5 for the detection of High group were 77% and 100%, respectively. The SUVmax distributions of the WHO histological thymoma types and Masaoka stage thymomas extensively overlapped. Masaoka stage III thymomas had significantly higher SUVmax than Masaoka stage I thymomas. Regarding the TNM classification, the SUVmax of T3 and T1b thymomas was higher than T1a thymoma. CONCLUSION: Although the SUVmax of each disease overlapped, PET/CT findings provided useful information for the differential diagnosis of anterior mediastinal masses.
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