Table 1 Pathologic classification of GGO nodules according to the IASLC/ATS/ERS criteria, 2011
| Â | Number | ALK positive | EGFR positive |
|---|---|---|---|
Total | 217 | 6 | 119 |
Adenocarcinoma in situ | 15 | 0 | 3 |
Minimally invasive adenocarcinoma | 16 | 0 | 11 |
Invasive adenocarcinoma | Â | Â | Â |
 Lepidic predominant | 36 | 1 | 19 |
 Acinar predominant | 93 | 3 | 53 |
 Papillary predominant | 42 | 1 | 28 |
 Micropapillary predominant | 1 | 0 | 1 |
 Solid predominant | 7 | 1 | 3 |
Variants of invasive adenocarcinoma | Â | Â | Â |
 Invasive mucinous adenocarcinoma | 5 | 0 | 0 |
 Enteric | 1 | 0 | 0 |
Adenosquamous carcinoma | 1 | 0 | 1 |