Table 4 Concordance and discordance of HER2 expression in dual block assessment in total patients
| Â | Case number, n (%) |
|---|---|
Concordant | 2823 (74.2) |
Discordant | 983 (25.8) |
 0 vs 1+ | 411 (41.8) |
 0 vs 2+ | 129 (13.1) |
 0 vs 3+ | 45 (4.6) |
 1 vs 2+ | 326 (33.2) |
 1 vs 3+ | 27 (2.7) |
 2 vs 3+ | 45 (4.6) |