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Table 3 Criteria for low, intermediate, and high grade of suspicion of distant (except for paraaortal) lymph node metastasis in PET/CT

From: 11C-acetate PET/CT in pre-therapeutic lymph node staging in high-risk prostate cancer patients and its influence on disease management - a retrospective study

  SUVmax<50% higher than mediastinal background SUVmax>50% higher than mediastinal background Any visually positive uptake on PET Pathological appearance on CT
Low grade +    -
Intermediate grade   +   -
High grade    + +