Table 2.
Distribution of histologic subtypes
| Histologic subtype | IASLC/ATS/ERS classification |
Our proposal introducing cribriform as a subtype |
||
|---|---|---|---|---|
| N | (%) | N | (%) | |
| Adenocarcinoma in situ | 2 | (0.2) | 2 | (0.2) |
| Minimally invasive adenocarcinoma | 34 | (3) | 34 | (3) |
| Invasive adenocarcinoma | ||||
| Lepidic predominant | 103 | (10) | 106 | (10) |
| Acinar predominant | 411 | (40) | 356 | (34) |
| Cribriform predominant | Not applicable | 46 | (4) | |
| Papillary predominant | 239 | (23) | 242 | (23) |
| Micropapillary predominant | 60 | (6) | 60 | (6) |
| Solid predominant | 136 | (13) | 139 | (13) |
| Variants | ||||
| Invasive mucinous | 44 | (4) | 44 | (4) |
| Colloid predominant | 9 | (1) | 9 | (1) |