Table 1:
Patient characteristics at PET/CT.
| Demographics | All patients |
|---|---|
| Age, years | 67.6 ± 10.3 |
| Sex | |
| Female | 36 (42.0%) |
| Male | 50 (58.0%) |
| Site of primary colorectal cancer | |
| Colon | 29 (34%) |
| Rectal | 57 (66%) |
| Tumor differentiation colorectal cancer primary | |
| Well differentiated | 3 (3%) |
| Moderately differentiated | 53 (62%) |
| Poorly differentiated | 11 (13%) |
| Unknown | 19 (22%) |
| pT colorectal cancer primary | |
| T0 | 4 (5%) |
| T1 | 4 (5%) |
| T2 | 12 (14%) |
| T3 | 55 (64%) |
| T4 | 7 (8%) |
| Unknown | 4 (5%) |
| pN colorectal primary | |
| Node+ | 52 (60%) |
| Node− | 28 (33%) |
| Unknown | 6 (7%) |
| Carcinoembryonic antigen | |
| 0–5 ng/mL | 52 (61%) |
| >5 ng/mL | 21 (24%) |
| Unknown | 13 (15%) |
| Chemotherapy colorectal cancer primary | |
| Preoperative | 43 (50%) |
| Postoperative | 39 (45%) |
| None | 4 (5%) |
| Thoracic lymph node involvement by PET | |
| Node+ | 18 (21%) |
| Node− | 68 (79%) |
| Pulmonary nodes detected by FDG-PET | 141 |
| Pulmonary nodes detected by CT | 234 |
| Pulmonary nodes resected (69 procedures) | 147 |
| Pulmonary metastases CRC | 97 |
| Different histology | 50 |
| Primary lung cancer | 8 |
| Treatment pulmonary nodules after PET/CT | |
| Surgical resection | 69 (81%) |
| No-local treatment (no surgery) | 17 (19%) |
| Number of pulmonary lesions surgical resected per procedure | |
| 1 | 38 |
| >1 | 31 |
| Surgical approach | |
| Unilateral | 56 |
| Bilateral/staged | 13 |
| Thoracic lymph node dissection | |
| No LND | 19 (22%) |
| Systematic LND | 40 (47%) |
| Lymph node sampling | 10 (12%) |
| No surgery | 17 (19%) |
| Thoracic metastatic lymph node involvement (histopathology) | |
| Node positive | 7 (9%) |
| Node negative | 33 (38%) |
| Unknown (no systematic LND or no surgery) | 46 (53%) |