Neoadjuvant Radiotherapy and Surgery for High-Risk Localized Ewing Sarcoma

May 27, 2026 updated by: Xie Lu, Peking University People's Hospital

An Observational Study on the Safety and Efficacy of Neoadjuvant Concurrent Chemoradiotherapy Sequential Surgery for High-Risk Localized Ewing Sarcoma

This is a single-center, single-arm, prospective observational study to evaluate the long-term local control rate, safety, and efficacy of preoperative neoadjuvant radiotherapy (36-45 Gy) followed by sequential radical surgery and postoperative chemotherapy in patients with high-risk, resectable localized Ewing sarcoma.

Study Overview

Status

Not yet recruiting

Conditions

Detailed Description

Patients diagnosed with high-risk localized Ewing sarcoma will routinely receive standard neoadjuvant chemotherapy. For patients with resectable tumors, preoperative neoadjuvant radiotherapy at a dose of 36-45 Gy will be administered, followed by definitive surgery and subsequent adjuvant chemotherapy. This study does not interfere with standard clinical management and focuses on collecting follow-up data to observe the local recurrence-free survival (LRFS), wound complications, and surgical margin status.

Study Type

Observational

Enrollment (Estimated)

55

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
      • Beijing, China
        • Peking University People's Hospital, Beijing, Beijing 100044
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Initial treated ewing sarcoma patients in PKUPH and later would recieve definitivesurgery in PKUPH with complete clinical materials.

Description

Inclusion Criteria:

  1. The subject or their legal representative signs the written informed consent prior to enrollment.
  2. Age <= 55 years old.
  3. Histologically confirmed Ewing sarcoma, with FET family (including EWSR1 or FUS) gene rearrangement confirmed by FISH or NGS. Clear FET-non ETS fusion cases are excluded.
  4. Deemed difficult to achieve a satisfactory surgical margin by 2 or more senior musculoskeletal oncologists.
  5. ECOG Performance Status: 0-1.
  6. Expected life expectancy >= 3 months.
  7. Women of childbearing potential must have a negative pregnancy test within 1 week prior to enrollment and agree to use contraception; male subjects must agree to use contraception or have undergone surgical sterilization during the study.

Exclusion Criteria:

  1. No opportunity for surgical resection after neoadjuvant chemotherapy.
  2. Extensive metastasis with no indication for local surgical resection.
  3. Uncontrolled concurrent medical conditions.
  4. Prior radiotherapy to the surgical site during front-line treatment.
  5. History of other malignant tumors within the past 5 years.
  6. Inability to cooperate with preoperative neoadjuvant radiotherapy (e.g., due to psychiatric factors).
  7. Any condition that, in the investigator's judgment, might harm the patient or prevent compliance with study requirements.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Local Recurrence-Free Survival (LRFS)
Time Frame: From the date of surgery up to the date of first documented local recurrence or death from any cause, assessed up to 5 years post-surgery.
Time from the date of surgery to the first documented local recurrence or death from any cause.
From the date of surgery up to the date of first documented local recurrence or death from any cause, assessed up to 5 years post-surgery.
Wound Healing Status
Time Frame: Postoperative week 2.
Evaluation of surgical wound healing grade (Grade A/B/C) according to clinical criteria.
Postoperative week 2.
Surgical Margin Status
Time Frame: At the time of pathological evaluation, typically within 7 to 14 days post-surgery.
Pathological evaluation of margins (R0/R1/R2) and the distance to the closest margin.
At the time of pathological evaluation, typically within 7 to 14 days post-surgery.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Icidence of Adverse Events (Safety)
Time Frame: From enrollment up to 30 days after the completion of all treatments.
Grading and frequency of adverse events, particularly wound complications and infections, graded by CTCAE v5.0.
From enrollment up to 30 days after the completion of all treatments.
Event-Free Survival (EFS)
Time Frame: From the date of surgery up to the date of first documented disease progression, recurrence, or death from any cause, assessed up to 5 years post-surgery.
Time from surgery to disease progression, recurrence, or death from any cause.
From the date of surgery up to the date of first documented disease progression, recurrence, or death from any cause, assessed up to 5 years post-surgery.
Overall Survival (OS)
Time Frame: From the date of surgery up to the date of death from any cause, assessed up to 5 years post-surgery.
Time from surgery to death from any cause.
From the date of surgery up to the date of death from any cause, assessed up to 5 years post-surgery.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Peking University People's Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

June 1, 2026

Primary Completion (Estimated)

December 1, 2027

Study Completion (Estimated)

December 1, 2027

Study Registration Dates

First Submitted

May 15, 2026

First Submitted That Met QC Criteria

May 27, 2026

First Posted (Actual)

June 2, 2026

Study Record Updates

Last Update Posted (Actual)

June 2, 2026

Last Update Submitted That Met QC Criteria

May 27, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PKUPH-sarcoma 25

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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