Does Lymph Node Count Influence Survival in Surgically Resected Non-Small Cell Lung Cancer?

Area of Science:

• Oncology
• Surgical Oncology
• Cancer Research

Background:

• The prognostic value of lymph node count in non-small cell lung cancer (NSCLC) surgery is debated.
• The number of lymph nodes sampled (NLNS) may serve as a quality indicator for NSCLC resection.
• Factors influencing NLNS include patient demographics, tumor characteristics, and surgical approach.

Purpose of the Study:

• To investigate the impact of NLNS on overall survival (OS) and cancer-specific survival (CSS) in NSCLC patients.
• To determine if NLNS is an independent prognostic factor for surgically treated NSCLC.
• To assess the relationship between NLNS and patient survival outcomes.

Main Methods:

• Analysis of 16,393 patients with Stage I-III NSCLC from the California Cancer Registry (2004-2011).
• Utilized Kaplan-Meier and Cox proportional hazards modeling to evaluate NLNS influence on survival.
• Adjusted for demographic and clinical factors in survival analyses.

Main Results:

• Fewer than 10 lymph nodes sampled was associated with poorer OS in Stage I NSCLC.
• Increased NLNS correlated with improved survival, with hazard ratios indicating significant risk for lower counts.
• Sublobar resections had a high rate (43.8%) of no lymph nodes sampled.

Conclusions:

• NLNS significantly influences OS and CSS in NSCLC, with stage-dependent effects.
• Mediastinal lymphadenectomy is recommended to enhance patient survival in NSCLC.
• The precise optimal NLNS for maximizing survival in NSCLC requires further research.