Table 4 MRI-based response patterns of breast carcinomas on breast MRI after NAC and pathological response per MRI-based response pattern
Reader 1 | Reader 2 | |||||||
|---|---|---|---|---|---|---|---|---|
Number (percentage) | Tumor response > 50% | Diameter reduction > 50% | pCR | Number (percentage) | Tumor response > 50% | Diameter reduction > 50% | pCR | |
Complete radiologic response (type 0) | 13 (23%) | 12/13 (92%) | 7/12a (58%) | 5/13 (38%) | 9 (16%) | 9/9 (100%) | 5/8a (63%) | 4/9 (44%) |
Concentric shrinkage (type 1) | 19 (33%) | 11/19 (58%) | 7/19 (37%) | 2/19 (11%) | 8 (14%) | 5/8 (63%) | 4/8 (50%) | 2/8 (25%) |
Crumbling (type 2) | 11 (19%) | 7/11 (64%) | 5/11 (45%) | 1/11 (9%) | 15 (26%) | 11/15 (73%) | 6/15 (40%) | 1/15 (6%) |
Diffuse enhancement (type 3) | 0 (0%) | n.a. | n.a. | n.a. | 10 (18%) | 8/10 (80%) | 5/10 (50%) | 2/10 (20%) |
Stable disease (type 4) | 13 (23%) | 6/13 (46%) | 2/13 (15%) | 1/13 (8%) | 14 (25%) | 4/14 (29%) | 1/14 (7%) | 0/14 (0%) |
Progressive disease (type 5) | 1 (2%) | 1/1 (100%) | 0/1 (0%) | 0/1 (0%) | 1 (2%) | 0/1 (0%) | 0/1 (0%) | 0/1 (0%) |
Total | 57 (100%) | 37/57 (65%) | 21/56a (38%) | 9/57 (16%) | 57 (100%) | 37/57 (65%) | 21/56a (38%) | 9/57 (16%) |