Table 6.
Comparison of EGFR exon mutations based on CT findings
| Variable | EGFR mutation status | P | |
|---|---|---|---|
| 19 deletion (n = 41) | L858R (n = 54) | ||
| Diameter (mm) | 19.46 ± 5.61 | 19.51 ± 6.43 | 0.965 |
| Shape | |||
| Round/oval | 8 | 16 | 0.261 |
| Irregular | 33 | 38 | |
| Border definition | |||
| Well defined | 23 | 29 | 0.816 |
| Poorly defined | 18 | 25 | |
| Margins | |||
| Smooth | 12 | 25 | 0.092 |
| Lobulated/spiculated | 29 | 29 | |
| Cavitation/bubble‐like lucency | |||
| + | 10 | 13 | 0.972 |
| − | 31 | 41 | |
| Air bronchogram | |||
| + | 12 | 21 | 0.329 |
| − | 29 | 33 | |
| Thickening of the adjacent pleura | |||
| + | 5 | 8 | 0.713 |
| − | 36 | 46 | |
| Pleural retraction | |||
| + | 25 | 26 | 0.214 |
| − | 16 | 28 | |
| Vascular convergence | |||
| + | 8 | 7 | 0.386 |
| − | 33 | 47 | |
| Lymphadenopathy | |||
| + | 8 | 6 | 0.253 |
| − | 33 | 48 | |
| GGO proportion | |||
| GGO negative | 25 | 32 | 0.866 |
| Any GGO | 16 | 22 | |
| Lobe | |||
| Upper lobes | 33 | 51 | 0.229 |
| Lower lobes | 17 | 16 | |
CT, computed tomography; EGFR, epidermal growth factor receptor; GGO, ground‐glass opacity.