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Overall survival after resection of retroperitoneal sarcoma at academic cancer centers versus community cancer centers: An analysis of the National Cancer Data Base. Surgery 2018 02;163(2):318-323



Pubmed ID




Scopus ID

2-s2.0-85029656379   16 Citations


BACKGROUND: Operative resection remains the definitive curative therapy for retroperitoneal sarcoma. Data published recently show a correlation between improved outcomes for complex oncologic operations and treatment at academic centers. For large retroperitoneal sarcomas, operative resection can be complex and require multidisciplinary care. We hypothesized that survival rates vary between type of treating center for patients undergoing resection for retroperitoneal sarcoma.

METHODS: Patients with stage I to III nonmetastatic retroperitoneal sarcomas who underwent operative resection were identified from the National Cancer Database during the years 2004-2013. Treating centers were categorized as academic cancer centers or community cancer centers. Overall survival was analyzed by log-rank test and graphed using Kaplan-Meier method.

RESULTS: A total of 2,762 patients were identified. A majority of patients (59.4%, n = 1,642) underwent resection at an academic cancer centers. Median age at diagnosis was 63 years old. Neoadjuvant radiotherapy was more common at academic cancer centers, while adjuvant radiotherapy was more common at community cancer centers. Improved overall survival was seen at academic cancer centers across all stages compared with community cancer centers (P = .014) but, after multivariable Cox regression analysis, was not a significant independent predictor of survival (hazard ratio = 0.91, 95% confidence interval, 0.79-1.04, P = .171). Academic cancer centers exhibited a greater rate of R0 resection (55.9% vs 47.0%, P < .001) and a lesser odds of positive margins (odds ratio 0.83, 95% confidence interval, 0.69-0.99, P = .044) after multivariable logistic regression.

CONCLUSION: Resection for retroperitoneal sarcoma performed at academic cancer centers was an independent predictor of margin-negative resection but was not a statistically significant factor for survival. This observation suggests that site of care may contribute to some aspect of improved oncologic resection for retroperitoneal sarcoma.

Author List

Berger NG, Silva JP, Mogal H, Clarke CN, Bedi M, Charlson J, Christians KK, Tsai S, Gamblin TC


Manpreet Bedi MD Associate Professor in the Radiation Oncology department at Medical College of Wisconsin
John A. Charlson MD Associate Professor in the Medicine department at Medical College of Wisconsin
Kathleen K. Christians MD Professor in the Surgery department at Medical College of Wisconsin
Callisia N. Clarke MD Assistant Professor in the Surgery department at Medical College of Wisconsin
Thomas Clark Gamblin MD Chief, Professor in the Surgery department at Medical College of Wisconsin
Susan Tsai MD Associate Professor in the Surgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Academic Medical Centers
Cancer Care Facilities
Hospitals, Community
Middle Aged
Retroperitoneal Neoplasms
Retrospective Studies
United States