Research Article
Value of 18-F-FDG PET/CT and CT in the Diagnosis of Indeterminate Adrenal Masses
Table 1
Imaging features of adrenocortical adenomas, adrenal metastases, and adrenocortical carcinomas.
| | Characteristic | Adrenocortical adenomas | Adrenal metastases | Adrenocortical carcinomas |
| | Size (cm) | | | ( = 0.001) | | Well-defined margins (%) | 100 | 15.8 ( = 0.000) | 41.2 ( = 0.000) | | Homogeneous (%) | 6.25 | 72.2 ( = 0.001) | 30.3 | | Hemorrhage (%) | 12.5 | 6 | 12.5 | | Calcifications (%) | 81.3 | 0 ( = 0.000) | 20.6 ( = 0.000) | | Cyst/necrosis (%) | 31.3 | 29.4 | 58.8 | | Macroscopic fat (%) | 62.5 | 0 ( = 0.000) | 0 ( = 0.000) | | Walls (%) | 18.8 | 0 ( = 0.04) | 22 | | SUVmax | 3.24 ± 1.55 | 7.5 ± 2.7 ( = 0.003) | 11.38 ± 2.77 ( = 0.000) | | SUVmax/SUVliver | 1.33 ± 0.76 | 2.68 ± 0.9 ( = 0.003) | 4.3 ± 0.98 ( = 0.000) | | ADC (mm2/s) | 1842 | 1035 | 986 ( = 0.045) | | Unenhanced density (HU) | 27 ± 6 | 34 ± 6 | 33.6 ± 5 |
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