Table 6 Sensitivity and specificity of the significant MR findings in the diagnosis of mass-forming AIP
Sensitivity (%) | Specificity (%) | |
|---|---|---|
Multiplicity | 33.3 (4/12) | 100 (28/28) |
Irregular or geographical shape | 52.9 (9/17) | 90 (27/30) |
Capsule-like rim enhancement | 35.3 (6/17) | 100 (30/30) |
Absence of internal cystic or necrotic portion | 100 (17/17) | 33.3 (10/30) |
Absence of side branch dilation | 91.7 (11/12) | 56.7 (17/30) |
Pancreatic phase homogeneous enhancement | 47.1 (8/17) | 93.3 (28/30) |
Venous phase homogeneous enhancement | 70.6 (12/17) | 93.3 (28/30) |
Delayed phase homogeneous enhancement | 76.5 (13/17) | 93.3 (28/30) |
MPD stricture | 50.0 (6/12) | 96.7 (29/30) |
MPD skipped strictures | 25.0 (3/12) | 100 (30/30) |
Maximum upstream MPD diameter < 2.4 mm | 88.9 (8/9) | 84.6 (22/26) |
ADC value < 1.099 × 10−3 mm2/s) | 88.2 (15/17) | 60.0 (18/30) |
ContrastUP > 0.737 | 64.7 (11/17) | 83.3 (25/30) |
ContrastAP > 0.690 | 82.4 (14/17) | 83.3 (25/30) |
ContrastPP > 0.862 | 82.4 (14/17) | 76.7 (23/30) |
ContrastVP > 0.945 | 88.2 (15/17) | 70.0 (21/30) |
ContrastDP > 0.942 | 88.2 (15/17) | 50.0 (15/30) |