Postoperative Outcome of Surgery with Pancreatic Resection for Retroperitoneal Soft Tissue Sarcoma: Results of a Retrospective Bicentric Analysis on 50 Consecutive Patients.

Backgrounds: Multivisceral resection is the standard treatment for retroperitoneal sarcoma (RPS) during which pancreas resection may be necessary.

Methods: All consecutive patients operated for RPS with pancreatectomy in 2 expert centers between 1993 and 2018 were retrospectively analyzed.

Results: Fifty patients (median age: 57 years, IQR: [46-65]) with a primary (n = 33) or recurrent (n = 17) RPS underwent surgery requiring pancreas resection (distal pancreatectomy (DP) (n = 43), pancreaticoduodenectomy (PD) (n = 5), central pancreatectomy (n = 1), and atypical resection (n = 1)). Severe postoperative morbidity (Clavien-Dindo III-IV) was observed in 14 patients (28%), and 7 of them (14%) required reoperation for anastomotic bowel leakage (n = 5), gastric volvulus (n = 1), or hemorrhage (n = 1). Pancreas-related complications occurred in 25 patients (50%): 10 postoperative pancreatic fistulas (POPF) (grade A (n = 12), grade B (n = 6), grade C (n = 1)), 13 delayed gastric emptying (grade A (n = 8), grade B (n = 4), grade C (n = 1)), 1 hemorrhage (grade C). Postoperative mortality was 4% (n = 2), all following PD, caused by a massive intraoperative air embolism and by a multiple organ failure after anastomotic leakage. Pathological analysis confirmed pancreatic involvement in 17 (34%) specimens. Microscopically complete resection (R0) was achieved in 22 (44%) patients. After a follow-up of 60 months, 36 patients (75%) were still alive, among whom 27 without recurrence (56%).

Conclusion: Pancreatic resection during RPS surgery is associated with significant postoperative morbidity and mortality. PD should be avoided whenever possible while other procedures seemed achievable without excessive morbidity and with long-term survival.