Long-term survival after resection for bronchogenic carcinoma

Area of Science:

• Thoracic Surgery
• Surgical Oncology
• Pulmonary Medicine

Background:

• Bronchogenic carcinoma (lung cancer) treatment has evolved over decades.
• Surgical resection remains a primary treatment modality for lung cancer.
• Assessing long-term survival trends is crucial for evaluating treatment efficacy.

Purpose of the Study:

• To analyze long-term survival outcomes for lung cancer patients undergoing surgical resection.
• To compare survival rates based on surgical technique (lobectomy vs. pneumonectomy) and time period.
• To identify factors influencing patient survival after lung cancer surgery.

Main Methods:

• Retrospective analysis of 915 bronchogenic carcinoma resections performed between 1945 and 1969.
• Patients categorized by resection type (lobectomy, pneumonectomy) and treatment era (1945-49, 1950-59, 1960-69).
• Calculation of observed and relative survival rates at 5, 10, 15, and 20 years.

Main Results:

• Overall, 249 patients survived over 5 years, with 22 surviving over 20 years.
• Lobectomy survival rates significantly improved in the 1960-69 period (5-year: 41%, 10-year: 28%, 15-year: 19%) compared to earlier periods.
• Pneumonectomy survival rates remained relatively consistent and lower across all periods.
• Relative survival rates for lobectomy showed substantial improvement in the latest period, indicating better long-term outcomes.

Conclusions:

• Lobectomy became the preferred surgical approach for lung cancer, demonstrating improved long-term survival, particularly in recent decades.
• The extent of the tumor and lymph node involvement were the most critical determinants of survival.
• Histologic type and tumor location had less impact on survival outcomes compared to disease stage.