Table 3.
Number of undetected lesions at the original Mx report according to breast pattern and lesion rank (1° = index cancer)
| Lesion rank | mean diameter and range | Total number of UD Mx lesions | Dense Breast (%) | Heterogeneous Dense Breast (%) | Fatty Breast with scattered Fibroglandular densities (%) | Breast with the density of fat (%) |
| index lesion | 25 mm (2–77) | 14 | 3 (21.4) | 8 (57.2) | 3 (21.4) | 0 (0.0) |
| 2nd | 9 mm (0.1–39) | 61 | 12 (19.7) | 31 (50.8) | 17 (27.9) | 1 (1.6) |
| 3rd | 6.9 mm (0.1–20) | 44 | 6 (13.6) | 25 (56.8) | 12 (27.3) | 1 (2.3) |
| 4th | 6.8 mm (0.1–39) | 29 | 6 (20.7) | 17 (58.6) | 5 (17.2) | 1 (3.5) |
| ≥ 5th | 6.3 mm (0.1–25) | 17 | 4 (23.5) | 10 (58.8) | 3 (17.7) | 0 (0.0) |
| Total | 165 | 31 (18.8) | 91 (55.1) | 40 (24.3) | 3 (1.8) | |
(UD Mx = Lesions undetected at mammography).