Table 6.
Combination of magnetic resonance findings for differentiating G1 from G2-3 pancreatic neuroendocrine neoplasms
| Number of features |
Diagnostic performance |
|||
| Se | Sp | PPV | NPV | |
| ≥ 1 | 100 (82.8-100) | 35.5 (19.8-54.6) | 54.5 (38.9-69.3) | 100 (67.8-100) |
| ≥ 2 | 79.2 (57.3-92.1) | 80.1 (61.9-91.9) | 76 (54.5-89.8) | 83.3 (64.5-93.7) |
| ≥ 3 | 58.3 (36.9-77.2) | 93.5 (77.1-98.9) | 87.5 (60.4-97.8) | 74.3 (57.6-86.4) |
| ≥ 4 | 20.8 (7.9-42.7) | 96.7 (81.5-99.8) | 83.3 (36.5-99.1) | 61.2 (46.2-74.4) |
| ≥ 5 | 8.3 (1.4-28.5) | 96.4 (86.4-99.4) | 100 (19.8-100) | 58.5 (44.2-71.6) |
MR findings are ill-defined margins, vascular invasion, liver metastases, size > 17.5 mm, ADC < 1.21 < 10-3 mm2/s. Diagnostic performances are expressed as percentages (95%CI). Se: Sensitivity; Sp: Specificity; PPV: Positive predictive value; NPV: Negative predictive value.