Table 5 Mean percentages of pathological response per MRI-based response pattern (mean percentage of reader 1 and 2) halfway through and after NAC
MRI halfway through NAC | MRI after NAC | |||||||
|---|---|---|---|---|---|---|---|---|
Percentage of total (N = 75) | Tumor response > 50% | Diameter reduction > 50% | pCR | Percentage of total (N = 57) | Tumor response > 50% | Diameter reduction > 50% | pCR | |
Complete radiologic response (type 0) | 8% | 90% | 83% | 83% | 20% | 96% | 61% | 41% |
Concentric shrinkage (type 1) | 40% | 78% | 37% | 26% | 24% | 61% | 44% | 18% |
Crumbling (type 2) | 30% | 65% | 40% | 14% | 23% | 69% | 43% | 8% |
Diffuse enhancement (type 3) | 2% | n.a. | n.a. | n.a. | 9% | n.a. | n.a. | n.a. |
Stable disease (type 4) | 21% | 53% | 39% | 3% | 24% | 38% | 11% | 4% |
Progressive disease (type 5) | 1% | n.a. | n.a. | n.a. | 2% | 50% | 0% | 0% |
Total | 100% | 69% | 41% | 21% | 100% | 65% | 38% | 16% |