Table 1. SPN population: demographic, radiological and pathological characteristics.
| Clinical data | N | % | Mean | Interval | SD |
|---|---|---|---|---|---|
| Gender | |||||
| Male | 895 | 56.2 | |||
| Female | 697 | 43.8 | |||
| Age | 67.15 | 22.0–89.0 | 8.90 | ||
| Nodule size (CT) | |||||
| <20 mm | 1,096 | 68.8 | |||
| 20–30 mm | 496 | 31.2 | |||
| Nodule side (CT) | |||||
| Right | 984 | 61.8 | |||
| Left | 608 | 38.2 | |||
| Nodule density (CT) | |||||
| Solid | 1,272 | 79.9 | |||
| Partially solid GGO | 291 | 18.3 | |||
| Pure GGO | 29 | 1.8 | |||
| SUVmax (PET) | 4.11 | (0–31.0) | 4.80 | ||
| Preoperative histology | |||||
| Yes | 718 | 45.1 | |||
| No | 874 | 54.9 | |||
| Type of lesion | |||||
| Benign | 30 | 1.9 | |||
| Malignant | 1,562 | 98.1 | |||
| Histology cohorts | |||||
| Benign diseases | 30 | 1.9 | (TBC n.3, Pseudotumor n.4, Other inflammatory diseases n.7, Hamartoma n.9, Hamartochondroma n.7) | ||
| Adenocarcinomas | 1,097 | 68.9 | (AAH n.29, AIS n.35, MIA n.164, Invasive adenocarcinoma n. 857, Adenoidocystic carcinoma n.12) | ||
| Carcinomas | 204 | 12.8 | (Squamous carcinoma n.203) | ||
| Neuroendocrine tumors | 162 | 10.2 | (Typical carcinoid n.91, Atypical carcinoid n.52, Large cell carcinoma n.14, SCLC n.5) | ||
| Other primary neoplasms | 27 | 1.7 | (Lymphoma n.6, Carcinosarcoma n.2, NSCLC NAS 19) | ||
| Metastases | 72 | 4.5 | |||
| Surgical approach | |||||
| Anterior according Copenhagen | 1,203 | 75.6 | |||
| Anterior according D’Amico | 182 | 11.4 | |||
| Lateral according McKenna | 76 | 4.8 | |||
| Posterior according Walker | 3 | 0.2 | |||
| Totally endoscopic according Gossot | 31 | 1.9 | |||
| Uniportal according Gonzalez Rivas | 97 | 6.1 | |||
| Conversion | 129 | 8.1 | |||
| Type of resection | |||||
| Upper lobectomy | 912 | 57.3 | |||
| Middle lobectomy | 127 | 8.0 | |||
| Lower lobectomy | 538 | 33.8 | |||
| Upper bilobectomy | 8 | 0.5 | |||
| Lower bilobectomy | 7 | 0.4 | |||
| LN dissection | 1,577 | 99.1 | |||
| LND type | |||||
| RND | 1,120 | 70.4 | |||
| Sampling | 457 | 28.7 | |||
| N resected LN | 13.33 | (0–64.0) | 7.93 | ||
| N status | |||||
| N0 | 1,392 | 87.4 | |||
| N1 | 92 | 5.8 | |||
| N2 | 78 | 4.9 | |||
| N micrometastases | 48 | 3.0 | |||
SPN, solitary pulmonary nodule; CT, computed tomography; GGO, ground glass opacities; PET, positron emission tomography; LN, lymph node; LND, lymph node dissection; RND, radical node dissection.