Table 2 Mammographic features of interval breast cancers at the latest screen and tumor size distribution
A SFM with prior SFM | B FFDM with prior SFM | C FFDM with prior FFDM | |
|---|---|---|---|
Missed interval cancers at latest screen, n | 42 | 35 | 39 |
Mammographic abnormality at latest screen, n (%) | |||
Mass | 28 (66.7) | 23 (65.7) | 27 (69.2) |
Calcifications | 2 (4.8) | 5 (14.3) | 5 (12.8) |
Mass with calcifications | 5 (11.9) | 4 (11.4) | 4 (10.3) |
Asymmetry | 2 (4.8) | 0 (0) | 0 (0.0) |
Architectural distortion | 5 (11.9) | 3 (8.6) | 3 (7.7) |
Type of interval cancer, n (%) | |||
Ductal carcinoma in-situ | 1 (2.4) | 1 (2.9) | 2 (5.1) |
Invasive cancer | 41 (97.6) | 34 (97.1) | 37 (94.9) |
Size distribution of invasive interval cancers, n (%) | |||
T1a-b | 2 (4.9) | 5 (14.7) | 4 (10.8) |
T1c | 15 (36.6) | 8 (23.5) | 9 (24.3) |
T2+ | 24 (58.5) | 20 (58.8) | 24 (64.9) |
Unknown | 0 (0.0) | 1 (2.9) | 0 (0.0) |
Mean size of invasive interval cancers, mm (range) | 29.3 (8-80) | 28.8 (2-100) | 25.5 (6-120) |
Breast density at latest screen, n (%) | |||
ACR I & II | 23 (54.8) | 21 (60.0) | 23 (59.0) |
ACR III & IV | 19 (45.2) | 14 (40.0) | 16 (41.0) |
Minimal sign interval cancers at latest screen, n | 31 | 20 | 20 |
Mammographic abnormality at latest screen, n (%) | |||
Mass | 19 (61.3) | 10 (50.0) | 10 (50.0) |
Calcifications | 7 (22.6) | 2 (10.0) | 2 (10.0) |
Mass with calcifications | 0 (0.0) | 2 (10.0) | 0 (0.0) |
Asymmetry | 3 (9.7) | 1 (5.0) | 5 (25.0) |
Architectural distortion, n (%) | 2 (6.5) | 5 (25.0) | 3 (15.0) |
Type of interval cancer, n (%) | |||
Ductal carcinoma in-situ | 2 (6.5) | 2 (10.0) | 1 (5.0) |
Invasive cancer | 29 (93.5) | 18 (90.0) | 19 (95.0) |
Size distribution of invasive interval cancers, n (%) | |||
T1a-b | 2 (6.9) | 0 (0.0) | 1 (5.3) |
T1c | 13 (44.8) | 8 (44.4) | 7 (36.8) |
T2+ | 14 (48.3) | 10 (55.6) | 11 (57.9) |
Mean size of invasive interval cancers, mm (range) | 24.5 (1-60) | 29.1 (11-80) | 28.4 (5-60) |
Breast density at latest screen, n (%) | |||
ACR I & II | 21 (67.7) | 14 (70.0) | 11 (55.0) |
ACR III & IV | 10 (32.2) | 6 (30.0) | 9 (45.0) |
Occult interval cancers at latest screen | 71 | 104 | 80 |
Type of interval cancer, n (%) | |||
Ductal carcinoma in-situ | 5 (7.0) | 6 (5.8) | 5 (6.3) |
Invasive cancer | 66 (93.0) | 98 (94.2) | 75 (93.8) |
Size distribution of invasive interval cancers, n (%) | |||
T1a-b | 12 (18.2) | 15 (15.3) | 12 (16.0) |
T1c | 22 (33.3) | 34 (34.7) | 26 (34.7) |
T2+ | 32 (48.5) | 48 (49.0) | 33 (44.0) |
Unknown | 0 (0.0) | 1 (1.0) | 4 (5.3) |
Mean size of invasive interval cancers, mm (range) | 21.8 (2-60) | 25.3 (2-90) | 23.2 (3-95) |
Breast density at latest screen, n (%) | |||
ACR I & II | 38 (53.5) | 65 (62.5) | 44 (55.0) |
ACR III & IV | 33 (46.5) | 39 (37.5) | 36 (45.0) |