Clinical trial Recruiting at 7 sites Interventional Ages 18 and up

Microwave ablation for colorectal liver metastases

Official title: Ablation With Confirmation of Colorectal Liver Metastases (ACCLAIM) Prospective Trial for Microwave Ablation as a Local Cure

Run by Society of Interventional Oncology · NCT05265169 · Data updated 2026-11-12

This study is testing if microwave ablation can effectively treat small colorectal liver tumors in people and help them live without cancer progression for at least two years.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment275 (estimated)
SponsorSociety of Interventional Oncology
Academic / other
Locations7 sites (Miami, Florida and 6 other locations)
StatusRecruiting
StartedJanuary 13, 2023
Main results expectedNovember 11, 2027
Study endsDecember 10, 2027
Registry record updatedJanuary 17, 2024
Trial IDNCT05265169 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 and older with pathologically confirmed colorectal cancer and up to three hepatic metastases, each measuring 2.5 cm or less.

Probably not a fit

Patients with colorectal liver metastases larger than 2.5 cm or those with extensive metastatic disease beyond the liver may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This international clinical trial aims to establish microwave ablation (MWA) as a preferred curative therapy for selected colorectal liver metastases (CLM) that can be effectively treated with sufficient margins. The study will enroll approximately 275 subjects with one to three CLMs, each measuring up to 2.5 cm, and will assess the effectiveness of MWA in achieving a local progression-free survival rate of at least 90% over two years. The procedure will involve creating a minimum ablation margin of 5.0 mm around the tumors, with confirmation of the ablation zone assessed through imaging. The trial will utilize FDA cleared or CE Marked MWA devices and will be conducted across multiple centers.

Why it matters

Potential benefit: If successful, this approach could provide a minimally invasive treatment option that significantly improves local tumor control for patients with colorectal liver metastases.

How similar studies have gone: Previous studies have shown promising results with microwave ablation for liver tumors, suggesting that this approach may be effective, though this specific study's methodology is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Patient must be at least 18 years old.
2. Patient has signed a written informed consent for the MWA and participation in the study.
3. Patient with pathologically confirmed CRC with hepatic metastases confirmed on imaging (e.g., CT or MRI).
4. Patient has up to 3 hepatic metastases, each up to 2.5 cm in largest diameter.
5. Patient may have up to 5 lesions in the lung (none larger than ≥ 2.0 cm) and/or any lymph node ≤2.0 cm in the largest diameter
6. Ability to safely create an ablation zone (AZ) that completely covers the tumor with minimal margin of 5.0 mm. Subcapsular (any tumor within 10 mm from the liver capsule) or perivascular (any tumor within 10 mm from a vessel larger than 3 mm) lesions may be included. For these tumors, the calculation of the margin will not apply to the area abutting the capsule or the vessel.
7. The target tumor(s) is/are visible by US and/or CT in a location where MWA is technically achievable and safe based on the proximity to adjacent structures. Protective maneuvers such as hydrodissection for organ mobilization are allowed and will be recorded.
8. ECOG performance status of 0-1.
9. Platelet count \>50,000/mm3 (correctable allowed) within 30 days prior to study treatment.

Exclusion Criteria:

1. Patient is unable to lie flat or has respiratory distress at rest.
2. Patient has uncontrolled and uncorrectable coagulopathy or bleeding disorders.
3. Patient has a history of an allergic reaction to intravenous iodine that cannot be pre-medicated or prevents performance of a CT with IV contrast.
4. Patient has evidence of active systemic infection.
5. Patient has a debilitating medical or psychiatric illness that would preclude giving informed consent or receiving optimal treatment or follow up.
6. Patient is currently participating in other experimental studies that could affect the primary endpoint.
7. Patient unable to receive general anesthesia or adequate analgesia and sedation.
8. Tumor location less than 25 mm from hilum (see diagrams with illustration of central ducts).
9. Patient is currently pregnant or intends to become pregnant

Where it's running

  • Miami Cancer Institute
    Miami, Florida, United States
    Recruiting
  • Mayo Clinic
    Rochester, Minnesota, United States
    Recruiting
  • Memorial Sloan Kettering Cancer Center
    New York, New York, United States
    Recruiting
  • MD Anderson Cancer Center
    Houston, Texas, United States
    Recruiting
  • Medical College of WI
    Milwaukee, Wisconsin, United States
    Recruiting
  • National and Kapodistrian University of Athens (NKUA)
    Athens, Greece
    Recruiting
Show 1 more location
  • Amsterdam UMC
    Amsterdam, Netherlands
    Recruiting

Study contacts

  • Principal investigator: Constantinos Sofocleous, MD, PhD, FSIR, FCIRSE — Memorial Sloan Kettering Cancer Center
  • Study coordinator: Research Manager
  • Email: ACCLAIM@SIO-central.org
  • Phone: 202-367-1164

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.