# Sylvie Bonvalot

Source: https://onco.cc/people/sylvie-bonvalot/  
OnCo record `sylvie-bonvalot` (Person). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Paris surgeon who championed compartmental resection for retroperitoneal sarcoma and led STRASS, the trial that showed preoperative radiotherapy does not improve abdominal recurrence-free survival overall.

## Summary

Sylvie Bonvalot is a sarcoma surgeon at Institut Curie in Paris. She was first author of the 2009 Journal of Clinical Oncology study showing that systematic en bloc resection of adjacent organs reduced local recurrence in primary retroperitoneal sarcoma, and of the 2020 Lancet Oncology report of the EORTC STRASS trial, in which preoperative radiotherapy did not significantly improve abdominal recurrence-free survival compared with surgery alone, though a possible benefit in liposarcoma remains under study.

## Fields

- Kind: Person
- Last checked: 2026-09-18
- Tags: sarcoma; surgery; trialist
- Role: Surgical oncologist, Institut Curie, Paris
- Specialisms: Retroperitoneal sarcoma; Sarcoma surgery; Preoperative radiotherapy

## Connected records

- cancers: [Liposarcoma](https://onco.cc/cancers/liposarcoma/), [Retroperitoneal sarcoma](https://onco.cc/cancers/retroperitoneal-sarcoma/), [Sarcomas (soft tissue, bone, GIST)](https://onco.cc/cancers/sarcoma/)
- institutions: [Institut Curie](https://onco.cc/institutions/institut-curie/)
- key papers: [Primary retroperitoneal sarcomas: a multivariate analysis of surgical factors associated with local control](https://onco.cc/key-papers/paper-bonvalot-retroperitoneal-sarcoma-compartmental-jco-2009/), [STRASS (EORTC 62092): preoperative radiotherapy plus surgery versus surgery alone for primary retroperitoneal sarcoma](https://onco.cc/key-papers/paper-strass-lancet-oncol-2020/)

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