Resectable extra-pleural and extra-meningeal solitary fibrous tumours: A multi-centre prognostic study

S. Pasquali, A. Gronchi, D. Strauss, S. Bonvalot, L. Jeys, S. Stacchiotti, A. Hayes, C. Honore, P. Collini, S. L. Renne, N. Alexander, R. J. Grimer, D. Callegaro, V. P. Sumathi, D. Gourevitch, A. Desai

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Extra-pleural and extra-meningeal solitary fibrous tumour (SFT) is a rare sarcoma histotype curable with surgery in the majority of patients. The behaviour of these tumours ranges from indolent/very low grade to malignant/high grade but it is still not possible to accurately predict prognosis after surgery. We have investigated a multi-centre series to stratify the risk of recurrence to patients with SFTs. Methods: We retrospectively analysed the data from 243 patients who underwent surgery (2002-2011) at four sarcoma referral centres. Results: Upon univariate analysis, hypercellularity, atypia, necrosis, high mitotic rate (ie >4 mitoses/10 HPF) were associated with both disease-free and overall survival. Surgical margins were a significant prognostic factor for disease-free (P = 0.007) but not for overall survival. Unexpectedly, larger tumour size was associated with a better prognosis (P = 0.038) and fewer recurrences (P = 0.024). Upon multivariable analysis, high mitotic rate (hazard ratio, HR = 2.85, P = 0.002), cellular atypia (HR = 1.62, P = 0.015) and hypercellularity (HR = 1.82, P = 0.031) were significantly associated with recurrences. A SFT recurrence score has been provided to stratify risk of recurrence. Conclusion: This study provides a prognostic model to stratify risk of recurrence in patients with resectable SFTs. This allows clinician to decide on an optimal follow-up strategy and to select patients that may benefit from adjuvant treatments.

Original languageEnglish
JournalEuropean Journal of Surgical Oncology
DOIs
Publication statusAccepted/In press - 2016

Keywords

  • Haemangiopericytoma
  • Prognosis
  • Sarcoma
  • Solitary fibrous tumour

ASJC Scopus subject areas

  • Oncology
  • Surgery

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