Table 5 CT characteristics of 117 lesions by clinical diagnosis
From: Clinical analysis of adrenal lesions larger than 5 cm in diameter (an analysis of 251 cases)
CT characteristics | Benign adenoma (n = 34) | Pheochromocytoma (n = 35) | Cortical carcinoma (n = 18) | Metastatic carcinoma (n = 23) | Gangliocytoma (n = 7) | |
|---|---|---|---|---|---|---|
Diameter (cm) | 6.55 ± 1.76 | 7.6.1 ± 2.27 | 9.37 ± 3.46 | 7.53 ± 2.44 | 8.18 ± 2.76 | |
Shape | Round | 32 (94.12%) | 30 (85.71%) | 7 (38.89%) | 13 (56.52%) | 6 (85.71%) |
Lobulated | 2 (5.88%) | 2 (5.71%) | 5 (27.78%) | 8 (34.78%) | 0 | |
Infiltrative | 0 | 3 (8.57%) | 6 (33.33%) | 2 (8.70%) | 1 (14.29%) | |
Margin | Circumscribed | 33 (97.06%) | 33 (94.29%) | 7 (38.89%) | 15 (65.22%) | 6 (85.71%) |
Ill-defined | 1 (2.94%) | 2 (5.71%) | 11 (61.11%) | 8 (34.78%) | 1 (14.29%) | |
Heterogeneity | Homogeneous | 19 (55.88%) | 2 (5.71%) | 2 (11.11%) | 1 (4.35%) | 6 (85.71%) |
Heterogeneous | 15 (44.12%) | 33 (94.29%) | 16 (88.89%) | 22 (95.65%) | 1 (14.29%) | |
Necrosis | Negative | 20 (58.82%) | 2 (5.71%) | 6 (33.3%) | 10 (43.48%) | 6 (85.71%) |
Positive | 14 (41.18%) | 33 (94.29%) | 12 (66.67%) | 13 (56.52%) | 1 (14.29%) | |
Calcifications | 14 (41.18%) | 6 (14.14%) | 5 (27.78%) | 0 | 0 | |
Pre-contrast attenuation (HU) | 23.94 ± 16.16 | 40.17 ± 7.78 | 36.89 ± 10.59 | 32.35 ± 9.05 | 32.86 ± 8.51 | |
Contrast attenuation (HU) | Arterial phase | 50.94 ± 23.01 | 87.46 ± 38.44 | 57.28 ± 17.67 | 55.26 ± 18.84 | 46.86 ± 28.29 |
Venous phase | 68.59 ± 31.95 | 91.17 ± 26.74 | 73.44 ± 29.22 | 58.13 ± 16.55 | 50.14 ± 24.12 | |
Delay phase | 55.32 ± 26.32 | 79.37 ± 16.25 | 69.61 ± 24.75 | 53.48 ± 14.64 | 46.71 ± 17.81 | |