Seeking international consensus on approaches to primary tumour treatment in Ewing sarcoma

Overview

This work reports an international effort to find where sarcoma experts agree and disagree on local treatment of the primary tumour in Ewing sarcoma. Practice varies widely between countries and centres, and randomised evidence to guide the choice is limited.

Local treatment options

The primary tumour can be treated with surgery, radiotherapy, or both. The choice depends on tumour site and size, whether complete removal is achievable, the expected functional result, response to initial chemotherapy, and the long-term risks of each approach, including second cancers after radiotherapy.

Areas of agreement

Experts broadly agree that decisions should be made by an experienced multidisciplinary team and that surgery is favoured when a complete resection with good function is feasible. Radiotherapy is favoured when surgery would be mutilating or leave inadequate margins. Additional radiotherapy is generally recommended after incomplete resection or a poor histological response.

Areas of uncertainty

Consensus was weaker for pelvic and spinal tumours, for patients with metastatic disease, and for how to weigh function against local control. The authors highlight these areas as priorities for future trials and shared data collection.

Implications

The findings support a structured, individualised discussion of local treatment for every patient, and harmonised approaches within international trials.