Salvage Surgery for Recurrent Retroperitoneal Well-Differentiated Liposarcoma: Early Reoperation may not Provide Benefit

Current evidence regarding salvage resection for recurrent retroperitoneal (RP) sarcomas generally lacks detailed histology-specific analyses, but the aggressiveness of these tumors varies widely by histology. We investigated associations between timing and extent of salvage surgery and survival outcomes in patients with recurrent RP well-differentiated liposarcoma (WDLPS). The University of Texas MD Anderson Cancer Center Surgical Oncology sarcoma database was reviewed to identify patients with RP WDLPS who underwent surgical resection for first recurrent disease (salvage surgery) in 1995–2015. Medical records were retrospectively reviewed to identify factors associated with overall survival and disease-free survival. We identified 52 patients who underwent salvage surgery for RP WDLPS for first local recurrence; 28 (54%) underwent salvage surgery within 6 months after recurrence. Concomitant organ resections were performed in 32 (62%) patients, 4 (13%) of whom had pathologic invasion of resected organs. After R0/R1 resections (n = 45), 38 (84%) experienced a second local recurrence. Multivariable analyses revealed that organ invasion at the primary surgery [hazard ratio (HR) 13.08; p = 0.005] and disease-free interval