Table 3 Frequency of assessed imaging features in retroperitoneal extra-adrenal paragangliomas.
From: MR imaging features of benign retroperitoneal extra-adrenal paragangliomas
Imaging Feature | Reader 1 | Reader 2 | P value |
|---|---|---|---|
Location | |||
Right paravertebral region | 8.33 (2/24) | 8.33 (2/24) | 1.000 |
Left paravertebral region | 37.5 (9/24) | 41.67 (10/24) | |
Prevertebral region | 54.17 (13/24) | 50 (12/24) | |
Pelvic cavity | 0 (0) | 0 (0) | |
Shape | |||
Round or oval | 83.33 (20/24) | 87.5 (21/24) | 1.000 |
Irregular | 16.67 (4/24) | 12.5 (3/24) | |
Boundaries | |||
Well-defined | 66.67 (16/24) | 70.83 (17/24) | 1.000 |
Partly poorly defined | 33.33 (8/24) | 29.17 (7/24) | |
Microscopic fat | |||
YES | 12.5 (3/24) | 16.67 (4/24) | 1.000 |
NO | 87.5 (21/24) | 83.33 (20/24) | |
Subacute hemorrhage | |||
YES | 54.17 (13/24) | 50 (12/24) | 1.000 |
NO | 45.83 (11/24) | 50 (12/24) | |
High signal in DWI | |||
Higher | 54.17 (13/24) | 54.17 (13/24) | 1.000 |
Lower | 29.17 (7/24) | 25 (6/24) | |
Equal | 16.67 (4/24) | 20.83 (5/24) | |
Necrosis | |||
YES | 75 (18/24) | 70.83 (17/24) | 1.000 |
NO | 25 (6/24) | 29.17 (7/24) | |
Cysts | |||
YES | 62.5 (15/24) | 66.67 (16/24) | 1.000 |
NO | 37.5 (9/24) | 33.33 (8/24) | |
Degree of tumor enhancement | |||
Avid enhancement | 41.67 (10/24) | 33.33 (8/24) | 0.926 |
Moderate enhancement | 41.67 (10/24) | 50 (12/24) | |
Slight enhancement | 16.67 (4/24) | 16.67 (4/24) | |
