Adjuvant Radiation Therapy for Thoracic Soft Tissue Sarcomas: A Population-Based Analysis

Area of Science:

• Oncology
• Radiation Oncology
• Surgical Oncology

Background:

• The role of adjuvant radiation therapy (RT) in managing thoracic soft tissue sarcomas (STSs) is not well-defined.
• Thoracic STSs are rare and complex malignancies requiring multidisciplinary management.
• Understanding RT's impact on survival is crucial for treatment optimization.

Purpose of the Study:

• To investigate the characteristics of patients with thoracic STSs who underwent surgical resection followed by adjuvant RT.
• To evaluate the impact of adjuvant RT on overall survival (OS) outcomes in patients with thoracic STSs.
• To identify predictors for receiving adjuvant RT in this patient population.

Main Methods:

• Utilized the National Cancer Database (NCDB) to identify patients with surgically resected thoracic STSs (2004-2012).
• Performed analyses to identify factors associated with receiving adjuvant RT.
• Conducted survival analyses, including propensity score-matched cohorts, to compare OS between patients who received RT and those who did not.

Main Results:

• 1215 patients were analyzed; 45.8% received adjuvant RT.
• Tumor grade, size, and margins were significant predictors for receiving RT.
• Adjuvant RT was associated with improved survival in both unmatched (HR 0.79) and propensity score-matched (P=0.02) cohorts.
• Patients with high-grade tumors demonstrated a more pronounced survival benefit from RT.

Conclusions:

• This large population-based study suggests a significant survival benefit of adjuvant RT for thoracic STSs.
• The survival advantage of RT was more evident in patients with high-grade tumors.
• Further randomized prospective studies are recommended to confirm these findings and elucidate the precise role of RT.