The combination of maximum standardized uptake value and clinical parameters for improving the accuracy in distinguishing primary mediastinal lymphomas from thymic epithelial tumors.

"Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://qims.amegroups.com/article/view/10.21037/qims-23-496/coif). The authors have no conflicts of interest to declare."

"Funding: This study was supported by the Shanghai Sailing Program ( grant No. 21YF1442700 ), the Natural Science Foundation of Shanghai ( grant No. 21ZR1458900 ), the National Natural Science Foundation of China ( grant Nos. 82272044, 82372007, and 82202219 ), the Nurture Projects for Basic Research of Shanghai Chest Hospital ( grant Nos. 2020YNJCM07, 2020YNJCQ11, 2020YNJCQ06, and 2021YNJCM09 ), and the Special Project of Integrated Traditional Chinese and Western Medicine in General Hospital of Shanghai Health Committee ( grant No. ZHYY-ZXYJHZX-202023 )."