Effect of family history of cancer on postoperative survival in patients with non-small cell lung cancer.

BACKGROUND

Family history of cancer (FHC) has been reported to increase mortality of non-small cell lung cancer, mainly comprised of lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC). However, the impact of FHC on long-term survival remains controversial. This study aims to identify the impact of FHC on postoperative survival in LUAD and LUSC.

METHODS

Patients underwent lung resection for LUAD or LUSC in West China Hospital from 2009 to 2021 were enrolled. The 5-year overall survival (OS), lung cancer-specific survival (LCSS) and progression-free survival (PFS) were compared between the patients with and without FHC. Multivariable Cox regression was also performed.

RESULTS

A total of 6,253 patients were enrolled, including 5,685 LUAD and 568 LUSC. Altogether 18.9% (1,077/5,685) patients had FHC in LUAD, and 12.7% (72/568) patients had FHC in LUSC. In LUAD, the patients with FHC showed comparable survival compared with the patients without FHC regarding 5-year OS (87.9% 86.5%, P=0.49), 5-year PFS (84.8% 80.9%, P=0.06), and 5-year LCSS (89.2% 88.0%, P=0.96). In LUSC, the patients with FHC had poorer survival compared with the patients without FHC according to 5-year OS (40.9% 68.2%, P=0.007), 5-year PFS (42.3% 66.2%, P=0.003), and 5-year LCSS (45.8% 72.7%, P=0.003). Multivariate analyses indicated that FHC was an independent prognostic factor of OS, PFS, and LCSS in the patients with LUSC.

CONCLUSIONS

FHC was associated with a poor survival after lung resection in LUSC not LUAD patients. More attention should be paid in postoperative monitoring and treatment in LUSC patients with FHC.