The distribution of the SUV max values in anterior mediastinal tumors. The SUV max values of low-grade thymomas, high-grade thymomas, TCs and MLs were 3.14 ± 0.73, 4.34 ± 1.49, 8.59 ± 3.05 and 10.08 ± 2.53, respectively. Significant differences were observed between low-grade and high-grade thymomas, and between TCs and MLs. The bars indicate mean ± SD. MLs: malignant lymphomas; SD: standard deviation; SUV max: maximum standardized uptake values; TCs: thymic carcinomas