Published in:
01-06-2020 | Metastasis | Sarcoma
Designing a Rational Follow-Up Schedule for Patients with Extremity Soft Tissue Sarcoma
Authors:
David A. J. Wilson, MD, MSc, FRCSC, Aaron Gazendam, MD, Julia Visgauss, MD, FACS, David Perrin, MD, FRCSC, Anthony M. Griffin, MSc, Peter W. Chung, MD, FRCPC, Charles N. Catton, MD, FRCPC, David Shultz, MD, FRCPC, Peter C. Ferguson, MD, MSc, FRCSC, Jay S. Wunder, MD, MSc, FRCSC
Published in:
Annals of Surgical Oncology
|
Issue 6/2020
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Abstract
Purpose
The risk of tumor recurrence after resection of soft tissue sarcoma (STS) necessitates surveillance in follow-up. The objective of this study was to determine the frequency/timing of metastasis and local recurrence following treatment for soft tissue sarcoma, and to use these data to justify an evidence-based follow-up schedule.
Methods
Utilizing a prospective database, a retrospective single center review was performed of all patients with minimum 2-year follow-up after resection of a localized extremity STS. Kaplan–Meier estimates were used to calculate the incidence of local recurrence and metastases on an annual basis for 10 years.
Results
We identified a total of 230 low-grade, 626 intermediate-grade and 940 high-grade extremity STS and a total of 721 events, 150 local recurrences and 571 metastases. Based on tumor size and grade, follow-up cohorts were developed that had similar metastatic risk. Using pre-determined thresholds for metastatic event, a follow-up schedule was established for each cohort.
Conclusion
Based on our results we recommend that patients with small low-grade tumors undergo annual follow-up for 5 years following definitive local treatment. Patients with large low-grade tumors, small intermediate-grade and small high-grade tumors should have follow-up every 6 months for the first 2 years, then yearly to 10 years. Only patients with large intermediate- or high-grade tumors require follow-up every 3 months for the first 2 years, then every 6 months for years 3–5, followed by annually until 10 years.