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| Characteristics (n = 60) | Value |
|---|---|
| Age (yr) | |
| Mean (±SD) | 75.7 (7.0) |
| Range | 56–88 |
| Tumor size (mm) | |
| Mean (±SD) | 34.9 (14.4) |
| Range | 12–57 |
| Histologic type | |
| Squamous cell carcinoma | 21 |
| Adenocarcinoma | 38 |
| Large cell carcinoma | 1 |
| Pathological grade | |
| Grade 1 | 15 |
| Grade 2 | 30 |
| Grade 3 | 15 |
| Lymphovascular invasion | |
| Positive | 49 |
| Negative | 11 |
| Pleural invasion | |
| Positive | 30 |
| Negative | 30 |
