2.
EGFR及KRAS基因突变检测结果(n=395)
Results of EGFR and KRAS mutation status (n=395)
| Item | n | Proportion (%) |
| EGFR gene | ||
| Exton 18 (G719X) | 10 | 2.5 |
| Exton 19 (19del) | 93 | 23.5 |
| Exton 21 | 81 | 20.5 |
| L858R | 73 | 18.5 |
| L861Q | 6 | 1.5 |
| L858R2 | 2 | 0.5 |
| Exton 20 | 4 | 1.0 |
| T790M | 1 | 0.3 |
| S768I | 3 | 0.7 |
| Combination of two mutations | 4 | 1.0 |
| 21L858R+20T790M | 1 | 0.3 |
| 18G719+20S768I | 1 | 0.3 |
| 19del+21L858R | 1 | 0.3 |
| 21L858R+20S768I | 1 | 0.3 |
| Wild type | 202 | 51.1 |
| Failed screening | 1 | 0.3 |
| KRAS gene | ||
| Mutation | 29 | 7.3 |
| Exton 2 | 27 | 6.8 |
| Exton 3 | 2 | 0.5 |
| Wild type | 364 | 92.2 |
| Failed screening | 2 | 0.5 |
| Combination of EGFR and KRAS mutations | 1 | 0.3 |