Table 4. Pathological diagnoses.
| Diagnosisa | All (N=196), n (%) | NTUH (N=178), n (%) | HGUA (N=18), n (%) |
|---|---|---|---|
| Primary lung cancerb | 119 (60.7) | 115 (64.6) | 4 (22.2) |
| Adenocarcinoma | 115 (58.7) | 112 (62.9) | 3 (16.6) |
| T1aN0M0 | 112 (57.1) | 110 (61.7) | 2 (11.1) |
| T1bN0M0c | 1 (0.5) | 0 | 1 (5.5) |
| T2N0M0 (PL1 or PL2)d | 2 (1.0) | 2 (1.1) | 0 |
| Squamous cell carcinoma | 1 (0.5) | 0 | 1 (5.5) |
| Carcinoid tumor | 1 (0.5) | 1 (0.5) | 0 |
| LELC | 1 (0.5) | 1 (0.5) | 0 |
| Tumorlet | 1 (0.5) | 1 (0.5) | 0 |
| Hodgkin lymphoma | 1 (0.5) | 1 (0.5) | 0 |
| Mucosa-associated lymphoid tissue (MALToma) | 1 (0.5) | 1 (0.5) | 0 |
| Metastatic lung cancer | 22 (11.2) | 20 (11.2) | 2 (11.1) |
| Pleural metastasis | 2 (1.0) | 1 (0.5) | 1 (5.5) |
| Adenocarcinoma in situ | 9 (4.6) | 9 (5.0) | 0 |
| Benign lesions | 42 (21.4) | 31 (17.4) | 11 (61.1) |
a, examination of 196 specimens in 188 patients; b, all primary lung cancers but 3 cases of adenocarcinoma belonged to T1aN0M0; c, in the T1b case: 3 cm tumor and lobectomy with lymphadenectomy was performed. d, in the 2 T2 cases: both lesions were less than 2 cm, but invaded visceral pleura. NTUH, National Taiwan University Hospital; HGUA, Hospital General Universitario Alicante; LELC, lymphoepithelioma-like carcinoma.