Table 2.
BI-RADS descriptor counts with mean reader upstaging estimates and actual upstaging percentages.
| Morphology | Count | Upstaging estimate | Actual upstaging |
|---|---|---|---|
| Amorphous | 291 (20%) | 17% | 43 (15%) |
| Coarse Heterogenous | 96 (6%) | 29% | 18 (19%) |
| Fine Pleomorphic | 794 (53%) | 29% | 168 (21%) |
| Fine Linear or fine-linear branching | 301 (20%) | 34% | 70 (23%) |
| Typical Benign* | 10 (1%) | 22% | 1 (10%) |
| Distribution | |||
| Diffuse | 1 (0%) | 5% | 0 (0%) |
| Regional | 122 (8%) | 36% | 31 (25%) |
| Grouped | 955 (65%) | 25% | 185 (19%) |
| Linear | 145 (10%) | 27% | 26 (18%) |
| Segmental | 255 (17%) | 38% | 54 (21%) |
| Mass | |||
| Yes | 65 (4%) | 41% | 18 (28%) |
| No | 1435 (96%) | 27% | 282 (20%) |
| Asymmetry | |||
| Yes | 140 (9%) | 40% | 36 (26%) |
| No | 1360 (91%) | 27% | 264 (19%) |
| Architectural distortion | |||
| Yes | 67 (4%) | 51% | 25 (37%) |
| No | 1433 (96%) | 27% | 275 (19%) |
Note – The count column refers to the number of times a descriptor was used by any reader for any case.
*
Typically benign BI-RADS morphologies include skin, vascular, coarse, large rod-like, round, rim, dystrophic, milk of calcium, and suture.