# The Goldilocks paradox: when partial oncoprotein inhibition fuels metastasis in Ewing sarcoma

## TL;DR

This paper shows that partial inhibition of a cancer-causing protein in Ewing sarcoma can actually make the cancer more likely to spread.

## Contribution

The study reveals a paradox where incomplete oncoprotein inhibition promotes metastasis in Ewing sarcoma.

## Key findings

- Incomplete EWS::FLI1 inhibition promotes metastatic behavior in Ewing sarcoma.
- This finding has critical implications for developing therapeutic strategies in pediatric oncology.

## Abstract

Targeting oncogenic fusion proteins remains a major challenge in pediatric oncology. In this issue of EMBO Molecular Medicine, Suresh et al (2025) demonstrate that incomplete inhibition of EWS::FLI1 in Ewing sarcoma paradoxically promotes metastatic behavior, revealing critical implications for therapeutic strategies.

JY Blay & colleagues discuss the study by Suresh et al, in this issue of EMBO Mol Med, that shows that incomplete inhibition of EWS::FLI1 in Ewing sarcoma paradoxically promotes metastatic behavior.