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Rates of primary resistance to T-DM1 per HER2 gene amplification in ctDNA and hormone receptor status
| HER2 gene amplification in ctDNA | |||
|---|---|---|---|
| Positive (N/total) | Negative (N/total) | ||
| Hormone receptor status | ER and PR negative (N/total) | 0/4 | 0/5 |
| ER and/or PR positive (N/total) | 0/1 | 4/6 | |
N number of patients with primary resistance to T-DM1
