Table 2 Key imaging features observed on CT and MRI
MiNEN, n (%) (n = 12) | PDAC, n (%) (n = 24) | NET, n (%) (n = 24) | p valuea | p valueb | κ value | |
|---|---|---|---|---|---|---|
Largest tumor diameter (cm) | ||||||
Mean ± SD | 4.7 ± 2.3 | 3.0 ± 1.0 | 4.3 ± 2.3 | 0.031 | 0.589 | 0.98c |
Range | 2.5–9.0 | 1.4–7.0 | 1.0–12.0 | |||
Tumor composition | 0.003 | 0.722 | 0.74 | |||
Purely solid | 4 (33.3) | 20 (83.3) | 9 (37.5) | |||
Minor cystic | 3 (25) | 3 (12.5) | 3 (12.5) | |||
Mixed solid and cystic | 5 (41.7) | 1 (4.2) | 12 (50) | |||
Heterogeneity | 10 (83.3) | 8 (33.3) | 21 (87.5) | 0.012 | > 0.999 | 0.89 |
Tumor margin | 0.588 | < 0.001 | 0.9 | |||
Well-defined smooth | 2 (16.7) | 2 (8.3) | 23 (95.8) | |||
Ill-defined irregular | 10 (83.3) | 22 (91.7) | 1 (4.2) | |||
Enhancement degree | < 0.001 | < 0.001 | 0.88 | |||
Mild | 0 (0) | 21 (87.5) | 0 (0) | |||
Moderate | 11 (91.7) | 3 (12.5) | 5 (20.8) | |||
Marked | 1 (8.3) | 0 (0) | 19 (79.2) | |||
Arterial enhancement pattern | 0.247 | 0.479 | 0.77 | |||
Rim type | 5 (41.7) | 5 (20.8) | 7 (29.2) | |||
Diffuse type | 7 (58.3) | 19 (79.2) | 17 (70.8) | |||
Portal enhancement pattern | > 0.999 | 0.031 | 0.91 | |||
Progressive enhancement | 11 (91.7) | 22 (91.7) | 13 (54.2) | |||
Washout | 1 (8.3) | 2 (8.3) | 11 (45.8) | |||
Tumor calcification | 2 (16.7) | 0 (0) | 1 (4.2) | 0.105 | 0.253 | 0.79 |
Visible lymph nodes | 2 (16.7) | 7 (29.2) | 2 (8.3) | 0.685 | 0.588 | 0.88 |
Bile duct dilatation | 2 (16.7) | 2 (8.3) | 4 (16.7) | 0.588 | > 0.999 | 0.8 |
Marked upstream MPD dilatation | 5 (41.7) | 10 (41.7) | 12 (50) | > 0.999 | 0.732 | 0.9 |
Adjacent organ involvement | 6 (50) | 13 (54.1) | 3 (12.5) | > 0.999 | 0.036 | 0.82 |
Vascular involvement | 3 (25) | 18 (75) | 3 (12.5) | 0.01 | 0.378 | 0.76 |