Is long-term survival possible after margin-positive resection of retroperitoneal sarcoma (RPS)?

Background/Objectives For various reasons, some patients undergo a gross margin positive resection (R2) leading to a dilemma in care. We hypothesized that there is a subset of patients who have long‐term survival (LTS, ≥5 years) after R2 resection for retroperitoneal sarcoma (RPS). Methods National Cancer Database data from 1998 to 2011 were reviewed to identify patients with RPS who had R2 resections. Logistic and Cox regression models were used to compare LTS with short‐term survival. Results Of 12,028 patients, R2 resection rate was 3.28% (4.9% in 1998; 2.5% in 2011). Median survival for RPS with R2 resection was 21 months versus 69 months for those with R0/R1 resections (P