Abstract
Induction chemotherapy (iC) followed by concurrent chemoradiation has been shown to improve overall survival (OS) for locally advanced pancreatic cancer (LAPC). However, the survival benefit of stereotactic body radiation therapy (SBRT) versus conventionally fractionated radiation therapy (CFRT) following iC remains unclear. The National Cancer Database (NCDB) was queried for primary stage III, cT4N0-1M0 LAPC (2004-2015). Kaplan-Meier analysis, Cox proportional hazards method, and propensity score matching were used. Among 872 patients, 738 patients underwent CFRT and 134 patients received SBRT. Median follow-up was 24.3 months and 22.9 months for the CFRT and SBRT cohorts, respectively. The use of SBRT showed improved survival in both the multivariate analysis (HR 0.78, p=0.025) and 120 propensity-matched pairs (median OS 18.1 vs 15.9 months, p=0.004) compared to the CFRT. This NCDB analysis suggests survival benefit with the use of SBRT versus CFRT following iC for the LAPC.
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