Table 1.
Frequency of ultrasonographic descriptors used for 76 benign masses by the two reviewers
| Characteristic | Radiologist 1 | Radiologist 2 |
|---|---|---|
| Shape | ||
| Round/oval | 48 (63.2) | 54 (71.1) |
| Irregular | 7 (9.2) | 10 (13.1) |
| Lobular | 21 (27.6) | 12 (15.8) |
| Margin | ||
| Circumscribed | 52 (68.4) | 59 (77.6) |
| Non-circumscribeda) | 24 (31.6) | 17 (22.4) |
| Indistinct | 14 (58.3) | 10 (58.8) |
| Angular | 5 (20.8) | 4 (23.5) |
| Micro-lobulated | 3 (12.5) | 2 (11.8) |
| Spiculated | 2 (8.3) | 1 (5.9) |
| Orientation | ||
| Parallel | 65 (85.5) | 69 (90.8) |
| Not parallel | 11 (14.5) | 7 (9.2) |
| Lesion boundary | ||
| Abrupt interface | 69 (90.8) | 71 (93.4) |
| Echogenic halo | 7 (9.2) | 5 (6.6) |
| Echo pattern | ||
| Hyperechoic | 1 (1.3) | 2 (2.6) |
| Mixed echogenic | 20 (26.3) | 17 (22.4) |
| Hypoechoic | 51 (67.1) | 54 (71.1) |
| Isoechoic | 4 (5.3) | 3 (3.9) |
| Posterior acoustic features | ||
| None | 58 (76.3) | 56 (73.7) |
| Shadowing | 4 (5.3) | 3 (3.9) |
| Enhancement | 14 (18.4) | 17 (22.4) |
Values are presented as number (%).
a)
For non-circumscribed masses, four additional suspicious descriptors (indistinct, angular, micro-lobulated, and spiculated) were used.