Clinicopathological characteristics of 112 patients with multiple primary lung cancers
| Characteristics | Number of patients (%) | Characteristics | Number of patients (%) |
| Total | 112 (100.0) | Total | 112 (100.0) |
| Sex | Surgery types | ||
| Female | 82 (73.2) | (Bi)lobectomy | 23 (20.5) |
| Male | 30 (26.8) | Lobectomy+sublobectomy | 41 (36.6) |
| Age | (Multi)sublobectomy | 48 (42.9) | |
| <60 | 86 (76.8) | Lymphadenectomy | |
| ≥60 | 26 (23.2) | Yes | 86 (76.8) |
| Smoking | No | 26 (23.2) | |
| No | 99 (88.4) | Surgical time | |
| Yes | 13 (11.6) | Synchronous | 104 (92.9) |
| Malignancy | Metachronous | 8 (7.1) | |
| No | 108 (96.4) | Histopathology | |
| Yes | 4 (3.6) | Same | 109 (97.3) |
| Family malignancy | Different | 3 (2.8) | |
| No | 97 (86.6) | Highest T stage | |
| Yes | 15 (13.4) | T1 | 90 (80.4) |
| Tumor numbers | T2 | 22 (19.6) | |
| 2 | 68 (60.7) | Highest N stage | |
| 3 | 23 (20.5) | N0 | 109 (97.3) |
| ≥4 | 21 (18.8) | N1 | 2 (1.8) |
| Tumor locations | N2 | 1 (0.9) | |
| Same lobe | 26 (23.2) | Highest TNM stage | |
| Ipsilateral | 43 (38.4) | ⅠA | 87 (77.7) |
| Bilateral | 43 (38.4) | ⅠB | 21 (18.8) |
| Tumor presentation time | ⅡA | 0 (0.0) | |
| Synchronous | 112 (100.0) | ⅡB | 3 (2.7) |
| Metachronous | 0 (0.0) | ⅢA | 1 (0.8) |