Research Article
The Effect of Gefitinib on Treatment Necessity and Prognosis of NSCLC Patients with Early EGFR Mutations
Table 3
Comparison between EGFR mutation types and metastatic sites.
| EGFR mutation type | Lung metastasis | Liver metastasis | Bone metastasis | Brain metastasis | | |
| Exon 19 deletion | 2 (9.09) | 2 (9.09) | 15 (68.18) | 3 (13.64) | 18.504 | 0.005 | Exon 20 T790M | 5 (20.00) | 2 (8.00) | 4 (16.00) | 14 (56.00) | Exon 21 L858 | 0 (0.00) | 1 (33.33) | 2 (66.67) | 0 (0.00) |
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