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Oncology

EWING'S SARCOMA LOCAL RECURRENCE - PREDICTABLE OR PREVENTABLE?

The European Musculo-Skeletal Oncology Society (EMSOS)



Abstract

The outcome for patients with Ewing's sarcoma recurrence is poor. Local recurrences occur in 8%-25%of these patients. The aim of the study was to analyze the patients who had a local recurrence to identify factors predicting the local recurrence and if it could be prevented

Methods

A retrospective analysis of 650 patients who had a diagnosis of Ewing's sarcoma treated between 1975 and 2009 at a single institution was performed and 64 patients (10%) who had a local recurrence were identified and analysed.

Results

Fifteen patients had metastases at diagnosis.20 patients had chemotherapy and radiotherapy only while 44 had chemotherapy and surgery +/− post op radiotherapy. Thirteen patients who were suitable for post –operative radiotherapy could not receive the treatment due to various reasons like biological reconstruction. The estimated 5 years survival for the patients was 15%. The risk of local recurrence is higher if the tumour is located in the axial skeleton, treatment with chemotherapy and radiotherapy alone [location and size of the tumour precluding surgery]. The risk of local recurrence is higher if the tumour was in the fibula or radius. One out of three patients who have good response to chemotherapy still went on to develop a LR. The use of biological reconstruction and younger age group often resulted in deferral of post-operative radiotherapy. Location and type of treatment can predict LR. Surgery with clear margins and post-operative radiotherapy given when indicated may reduce the incidence of LR.