Pathological finding | Benign (Group 1 + 3) (n = 29) | Malignant (Group 2) (n = 16) | ||
Maximum diameter (mm) (mean ± SD) | 9.8 ± 6.1
(2-30) | 23.6 ± 19.7
(8-94) | ||
Shape | Papillary | 9 | 11 | |
Rounded | 20 | 5 | ||
Signal intensity | T1-weighted image | Hyperintense | 2 | 0 |
Isointense | 0 | 0 | ||
Hypointense | 27 | 16 | ||
T2-weighted image | Hyperintense | 9 | 14 | |
Isointense | 0 | 0 | ||
Hypointense | 20 | 2 | ||
Post contrast study | enhancement | 22 (75.9%) | 16 (100%) | |
Attached angle of mural nodules to cyst wall (degree, mean ± SD) | mean ± SD | 77.2 ± 34.8
(24-146.6) | 80.9 ± 24.7
(37.8-12.2) | |
Obtuse (>90 degrees) | 15 | 5 | ||
Acute (<90 degrees) | 14 | 11 |