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, Adrenal tumor size was between 4 and 6 cm in 66 patients (81.5%), and superior to 6 cm in 15 patients (18.5%). 44 patients had initial surgery, and 37 were followed

, Among the 44 patients who had initial surgery, the investigator's rationale to proceed to surgery was based on the tumor diameter in 17 (4.5%), and/or imaging characteristics in 36

, 24 had a follow-up superior to 3 years (mean, 47 months; min, 36; max, 71), ie. 13 patients were operated in the first 3 years after initial diagnosis: reasons for surgery were: tumor growth in 75% (n=9) cases, and/or unenhanced CT > 10 in 33.3% (n=4) cases and/or hypersecretion in 38

, Altogether, among the 65 operated patients (44 at diagnosis, and 21 during the follow-up, p.13

, Beside myelolipomas (n=2) and nonmalignant tumor, 3 (23%) had a spontaneous CT density < 10 UH and 5 (38%) had a wash-out > 45%

, Altogether, unenhanced CT < 10 showed 85.6% (CI95%=54.5-98.1) sensitivity and 78, p.8

, )). A relative wash-out of 45% showed 61, a CT density of 19 gave 69.2% sensitivity (CI95%=38.5-90.9, p.5

, 1) sensitivity and 92.3% specificity (CI95%=81.4-97.4); a wash out of 41% gave 61.5% sensitivity (CI95%=31.5-86.1), and 96, pp.95-126

, 5%) had a 18F-FDG uptake ratio > 1.5, with 3 non-secreting pheochromocytomas (18F-FDG uptake ratio =1.9, 3.1, 2.4), 2 non-secreting adrenal adenomas, and 1 myelolipoma. A 18F-FDG uptake ratio of 1, Among the 13 patients with a malignant tumor, all had a 18F-FDG uptake ratio > 1.5. In contrast, among the 52 patients with a benign tumor, vol.6, p.100

, 2-100) and a specificity of 92.3% (CI95%=81.4-97.8) (p<0.0001). The ROC curves for spontaneous CT density, wash out and 18F-FDG uptake ratio are depicted in additional figures 1, vol.2