MRI and CT-guided radiation therapy for abdominopelvic sarcomas

Phase II Study of Magnetic Resonance Image and Computed Tomography-Guided Stereotactic Body Radiation Therapy for Abdominopelvic Sarcomas (MARS Trial)

PHASE2 · Jonsson Comprehensive Cancer Center · NCT06436612

This study tests if using MRI and CT scans to guide radiation therapy can help people with abdominopelvic sarcomas by targeting tumors more accurately while protecting healthy tissue.

Quick facts

PhasePHASE2
Study typeInterventional
Enrollment20 (estimated)
Ages12 Years and up
SexAll
SponsorJonsson Comprehensive Cancer Center (other)
Drugs / interventionsradiation
Locations1 site (Los Angeles, California)
Trial IDNCT06436612 on ClinicalTrials.gov

What this trial studies

This study evaluates the effectiveness of MRI and CT-guided stereotactic body radiation therapy (SBRT) for patients with abdominopelvic sarcomas. Participants will receive radiation treatment daily for five consecutive days, followed by surgical removal of the primary tumor within 12 weeks. The approach aims to deliver precise radiation doses to tumors while minimizing exposure to surrounding healthy organs. The study will also involve careful planning and simulation to ensure optimal treatment delivery.

Who should consider this trial

Good fit: Ideal candidates include individuals aged 12 and older with histologically confirmed sarcoma that is either primary or recurrent and resectable.

Not a fit: Patients with active treatment for another malignancy or a history of prior irradiation to the treatment area may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could improve tumor control and reduce side effects for patients with abdominopelvic sarcomas.

How similar studies have performed: Other studies have shown promising results with similar radiation therapy techniques, indicating potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Histologically confirmed sarcoma
* Primary or recurrent disease involving the abdomen or pelvis
* Resectable primary lesion
* Age ≥ 12 years old
* Karnofsky performance status (KPS) ≥ 70 or Eastern Cooperative Oncology Group (ECOG) 0-2
* If a woman is of childbearing potential, a negative serum or urine pregnancy test must be documented

Exclusion Criteria:

* Active treatment of a separate malignancy
* History of prior irradiation to the area targeted for treatment

Where this trial is running

Los Angeles, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Abdominopelvic Sarcomas

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.