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Detection of EGFR mutations from tissue and plasma samples.
| N (%) | Tissue | Plasma | Tissue | ||
|---|---|---|---|---|---|
| Before treatment | Before treatment P0 (%) |
Under treatment P1 (%) |
After PD P2 (%) |
After PD | |
| Number of samples | 24 | 24 | 23 | 16 | 3 |
| Activating mutation | 24 | 19 (79.2) | 6 (26.1) | 11 (68.8) | 3 (100) |
| Drug-resistant mutation (T790M) | NA | 2 (8.3) | 4 (17.4) | 8 (50.0) | 3 (100) |
