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New radiation method aims to improve sarcoma surgery outcomes

NCT ID NCT05224934

Disease control Sponsor: Cancer Institute and Hospital, Chinese Academy of Medical Sciences Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This trial is testing a new type of radiation therapy given before surgery for retroperitoneal sarcoma, a rare cancer in the abdomen. The radiation is delivered in just five high-dose sessions, targeting the tumor and any nearby nodules. The goal is to see if this approach reduces complications during and after surgery, while still effectively treating the cancer. The study will enroll 50 adults whose tumors can be safely treated with this method.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ultra-hypofractionated radiotherapy (stereotactic ablative radiotherapy)
What this could lead to
If successful, this could offer a more effective and safer way to treat retroperitoneal sarcoma before surgery, potentially reducing side effects and improving recovery.
What could go wrong
This is a small, early-phase trial with only 50 participants, so results may not apply to everyone. The radiation dose is high and could cause unexpected side effects or complications.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 50 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2022

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Primary soft tissue sarcoma of retroperitoneal or infra-peritoneal spaces of pelvis * Sarcoma not originated from bone structure, abdominal or gynecological viscera * All disease can be included safely within one radiotherapy field * Absence of extension through the sciatic notch or across the diaphragm * Histologically proven, excluding the following subtypes: Gastro-intestinal stromal tumors (GIST), rhabdomyosarcoma, PNET or other small round blue cells sarcoma, osteosarcoma or chondrosarcoma, aggressive fibromatosis, sarcomatoid or metastatic carcinoma * ECOG performance status 0 to 2 * American Society of Anesthesiologist (ASA) score ≤2 * Normal renal function: Calculated Creatinine Clearance ≥50ml/min（by Cockcroft-Gault formula）and functional contralateral kidney by differential renal isotope scan * Normal bone marrow and hepatic function. * Contraception was needed for female patients of child-bearing age, or male patients whose partner had child-bearing age * expected life expectancy longer than 5 years * Written consent form was given prior to treatment * Can safely be treated by radiotherapy and surgery Exclusion Criteria: * metastatic disease * Tumor was previously treated by radiotherapy * Involvement of liver, pancreatic head or duodenum

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Conditions

The condition(s) this trial relates to.

radiation injury retroperitoneal sarcoma sarcoma soft tissue sarcoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Radiotherapy side effect Retroperitoneal sarcoma Soft tissue sarcoma Stereotactic ablative radiotherapy Ultra-hypofractionated radiotherapy

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Radiotherapy Department of Cancer Hospital, Chinese Academy of Medical Sciences

    RECRUITING

    Beijing, Beijing Municipality, 100021, China

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