Personalizing the Approach to Retroperitoneal Soft Tissue Sarcoma: Histology-specific Patterns of Failure and Postrelapse Outcome after Primary Extended Resection
- 1.2k Downloads
To explore patterns of failure and postrelapse outcome of patients with retroperitoneal sarcoma primarily treated by extended resection.
All consecutive patients with primary retroperitoneal sarcoma, treated between January 2002 and December 2011 at two European sarcoma centers were included. Five-year overall survival (OS) and crude cumulative incidence (CCI) of local recurrence (LR) and distant metastases (DM) were calculated. Multivariate analyses for OS and CCI of LR and DM were performed. Postrelapse OS was investigated.
A total of 377 patients were identified. Median follow-up from the time of primary surgery was 44 months [interquartile range (IQR) 27–82]. Five-year OS was 64 % [95 % confidence interval (CI) 0.588, 0710]. CCI of LR and DM were 23.6 % (95 % CI 18.9, 29.4) and 21.9 % (95 % CI 17.6, 27.3), respectively. OS, CCI of LR and DM were 87, 18 % and 0 for well-differentiated liposarcoma; 54, 44 and 9 % for grade II dedifferentiated liposarcoma; 41,33, and 44 % for grade III dedifferentiated liposarcoma; 58, 5, and 55 % for leiomyosarcoma; and 85, 4, and 17 % for solitary fibrous tumor, respectively. Seventy-six patients developed LR. Median postrelapse follow-up was 27 months (IQR 10–58). Twenty-one patients (27 %) underwent a second surgical resection (complete in 18), while 55 (73 %) did not (22 multifocal, 17 inoperable, 16 other causes). Median postrelapse OS was 17 months (IQR 7–31). Well-differentiated liposarcoma histology and disease-free interval predicted postrelapse OS, while surgical resection did not.
When primary extended surgery limits LR, histologic subtype and grade determine the outcome. At recurrence, a second surgery is of limited benefit.
KeywordsOverall Survival Local Recurrence Distant Metastasis Leiomyosarcoma Liposarcoma
Conflict of Interest
The authors declare no conflict of interest.
- 1.Singer S, Maki RG, O’Sullivan B. Soft tissue sarcoma. In: DeVita VT Jr, Lawrence TS, Rosenberg SA. Cancer: principles and practice of oncology. 9th ed. Philadelphia: Lippincott Williams & Wilkins; 2011. p. 1533–77.Google Scholar
- 9.Strauss DC, Hayes AJ, Thway K, et al. Surgical management of primary retroperitoneal sarcoma. Br J Surg. 2010;101:520–3.Google Scholar
- 11.Gronchi A, Lo Vullo S, Fiore M, et al. Aggressive surgical policies in a retrospectively reviewed single-institution case series of retroperitoneal soft tissue sarcoma patients. J Clin Oncol. 2009;27:24–30.Google Scholar
- 19.Marubini E, Valsecchi MG. Analysing survival data for clinical trials and observational studies. Chichester, UK: Wiley; 1995.Google Scholar
- 23.Institute for Statistics and Mathematics of WU (Wirtschaftsuniversität Wien). The R Project for Statistical Computing. Available at: http://www.r-project.org/.
- 26.Tseng W, Madewell J, Wei W, et al. Locoregional disease patterns in well differentiated and dedifferentiated retroperitoneal liposarcoma: implications for the extent of resection? Ann Surg Oncol. In press.Google Scholar
- 30.ClinicalTrials.gov. Available at: http://clinicaltrials.gov/ct2/show/NCT01344018.