Focus on the tumor periphery in MRI evaluation of soft tissue sarcoma: infiltrative growth signifies poor prognosis

Josefin Fernebro, Marie Wiklund, Kjell Jonsson, Anders Rydholm, Mef Nilbert, Pär-Ola Bendahl, Jacob Engellau

Research output: Contribution to journalArticlepeer-review

30 Citations (SciVal)

Abstract

Purpose. Infiltrative microscopical peripheral growth of soft tissue sarcomas (STS) has been shown to be of prognostic importance and preoperative risk stratification could individualize neoadjuvant treatment. Patients and methods. We assessed peripheral tumour growth pattern on preoperative MRI from 78 STS. The findings were correlated to histopathology and to outcome. Results. The MRI-based peripheral tumour growth pattern was classified as pushing in 34 tumours, focally infiltrative in 25, and diffusely infiltrative in 19. All tumours with diffuse infiltration on MRI also showed microscopical infiltration, whereas MRI failed to identify infiltration in two-thirds of the microscopically infiltrative tumours. Diffusely infiltrative growth on MRI gave a 2.5 times increased risk of metastases (P = .01) and a 3.7 times higher risk of local recurrence (P = .02). Discussion. Based on this observation we suggest that MRI evaluation of STS should focus on the peripheral tumour growth pattern since it adds prognostic information of value for decisions on neoadjuvant therapies.
Original languageEnglish
Pages (from-to)21251
JournalSarcoma
Volume2006
DOIs
Publication statusPublished - 2006

Subject classification (UKÄ)

  • Cancer and Oncology
  • Orthopedics
  • Radiology, Nuclear Medicine and Medical Imaging

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