Table 1.
Radiological features determined on the screening mammograms in missed and minimal sign interval cancers diagnosed in women aged 50–69 years old at screening, in the first screening round of the Norwegian Breast Cancer Screening Program
| Radiological features | Missed | Minimal sign1 | All | |||
|---|---|---|---|---|---|---|
| No. | (%) | No. | (%) | No. | (%) | |
| Distortion | 13 | (16) | 10 | (19) | 23 | (17) |
| Poorly defined mass or asymmetric density | 40 | (50) | 27 | (51) | 67 | (50) |
| Mass | ||||||
| Circumscribed | 2 | (3) | 2 | (4) | 4 | (3) |
| Spiculated | 4 | (5) | 1 | (2) | 5 | (4) |
| Calcifications | ||||||
| Calcifications only | 5 | (6) | 8 | (15) | 13 | (10) |
| Density or mass with calcifications | 16 | (20) | 5 | (9) | 21 | (16) |
| Total | 80 | 53 | 133 | |||
1
No statistically significant differences between the missed and minimal signinterval cancers