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Concordance of HER2 Status Tested by FISH in Biopsy and Surgical Samples.
| Biopsy Samples | Surgical Samples | NPV (%) | PPV (%) | ||
| FISH NA | FISH A | Total | |||
| FISH NA | 75 | 4 | 79 | 94.9 | - |
| FISH A | 1 | 23 | 24 | - | 95.8 |
| Total | 76 | 27 | 103 | ||
| Concordance rate (%) | 98.7 | 85.2 | 95% | ||
FISH NA, percentage of cases that were not amplified on FISH; FISH A, percentage of cases that were amplified on FISH; NPV, negative predictive value; PPV, positive predictive value.
