NCT05673148 · Alliance for Clinical Trials in Oncology
Testing the Addition of Total Ablative Therapy to Usual Systemic Therapy Treatment for Limited Metastatic Colorectal Cancer, The ERASur Study
What this study is about
This phase III trial compares total ablative therapy and usual systemic therapy to usual systemic therapy alone in treating patients with colorectal cancer that has spread to up to 4 body sites (limited metastatic).
View original scientific description
This phase III trial compares total ablative therapy and usual systemic therapy to usual systemic therapy alone in treating patients with colorectal cancer that has spread to up to 4 body sites (limited metastatic). The usual approach for patients who are not participating in a study is treatment with intravenous (IV) (through a vein) and/or oral medications (systemic therapy) to help stop the cancer sites from getting larger and the spread of the cancer to additional body sites.
Interventions
PROCEDURE
Stereotactic Ablative Radiotherapy
Undergo SABR
PROCEDURE
Resection
undergo surgical resection
PROCEDURE
Microwave Ablation
undergo microwave ablation
DRUG
Chemotherapy
Receive SOC chemotherapy
PROCEDURE
Computed Tomography
Undergo CT scan
PROCEDURE
Magnetic Resonance Imaging
Undergo MRI
PROCEDURE
Positron Emission Tomography
Undergo PET scan
Primary outcome measures
Overall Survival (OS)
Time frame: From the date of randomization to the date of death due to all causes, assessed up to 5 years
o Description: The hazard ratio (HR) for OS will be estimated using a stratified Cox proportional hazards model and the 95% confidence interval (CI) for the HR will be provided. The Kaplan-Meier methodology will be used to estimate the median OS for each treatment arm, and Kaplan-Meier curves will be produced. OS will also be compared between treatment arms using the log rank test
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Women and men of reproductive potential should agree to use an appropriate method of birth control throughout their participation in this study due to the teratogenic potential of the therapy utilized in this trial. Appropriate methods of birth control include abstinence, oral contraceptives, implantable hormonal contraceptives or double barrier method (diaphragm plus condom)
- PRE-REGISTRATION (STEP 0): Pathologically proven diagnosis of metastatic colorectal adenocarcinoma with metastases (biopsy from primary tumor or metastatic site is acceptable)
- PRE-REGISTRATION (STEP 0): No known microsatellite instable (MSI) tumor
- PRE-REGISTRATION (STEP 0): No known BRAF V600E mutation
- PRE-REGISTRATION (STEP 0): Patients with treated brain metastases are eligible if follow-up brain imaging after central nervous system (CNS)-directed therapy shows no evidence of progression. No known peritoneal and/or omental metastases. If radiologic studies suggest the presence of peritoneal disease, a diagnostic laparoscopy is recommended to verify the absence of peritoneal implants
- PRE-REGISTRATION (STEP 0): Liver-only metastatic disease on baseline imaging prior to starting chemotherapy is NOT permitted. For patients with liver metastases, there must be at least one other site of metastasis in addition to the liver on initial imaging to be eligible for this study. Of note, patients who have metastatic disease to the liver and at least one other site on initial imaging who have liver-only metastatic disease on subsequent imaging after completing initial systemic therapy are eligible
- PRE-REGISTRATION (STEP 0): Patients must have measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) version (v) 1.1
- REGISTRATION (STEP 1): Patients with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification. To be eligible for this trial, patients should be class 2B or better
- REGISTRATION (STEP 1): Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial
- REGISTRATION (STEP 1): A female of childbearing potential is a sexually mature female who: 1) has not undergone a hysterectomy or bilateral oophorectomy; or 2) has not been naturally postmenopausal for at least 12 consecutive months (i.e., has had menses at any time in the preceding 12 consecutive months)
- REGISTRATION (STEP 1): Patients must have no overt evidence of disease progression during systemic therapy prior to registration
- REGISTRATION (STEP 1): Not eligible for hepatic artery infusion pump (HAIP) therapy or benefit of HAIP therapy is undefined
- REGISTRATION (STEP 1): Primary tumor is already resected OR patient has had a clinical complete response without surgical resection and no local regrowth (primary rectal tumors only) OR primary tumor is amenable to surgical resection, as determined by consultation and documentation with surgeon or documentation of discussion in the institutional multi-disciplinary tumor board where a surgeon confirms resectability. Patients with unresectable primary tumors are not eligible
- REGISTRATION (STEP 1): Four (4) or fewer apparent sites of metastatic disease based on review by local medical team of radiographic imaging obtained following at least 12 weeks of systemic therapy. Of note, the primary tumor and associated regional lymph nodes do not count as one of the sites of disease.
- Sites of metastatic disease must be radiographically evident, but pathologic confirmation is not required.
- Metastatic lesions must be amenable to surgical resection, microwave ablation, radiationSABR or any combination of these modalities.
- Subcentimeter indeterminate lesions such as lung nodules \< 5 mm in size may be considered metastases unless there are \> 2 months of documented stability prior to the initiation of systemic
- Single sites include:
- Each hemiliver (right and left), each lobe of the lungs, each adrenal gland, lymph nodes amenable to a single resection or treatment in a single SABR field, bone metastases amenable to treatment in a single SABR field.
- REGISTRATION (STEP 1): Patients must have measurable disease per RECIST v1.1
- REGISTRATION (STEP 1): Patients must be receiving (or have received) first-line systemic therapy for metastatic disease for a minimum of 12 weeks and a maximum of 52 weeks
- REGISTRATION (STEP 1): Prior definitive therapy, including adjuvant chemotherapy, must have been completed at least 6 months prior to diagnosis of metastatic disease
- REGISTRATION (STEP 1): Not pregnant and not nursing, because this study involves an agent or treatment that has known genotoxic, mutagenic, and teratogenic effects. \
- Therefore, for women of childbearing potential only, a negative pregnancy test done =\< 14 days prior to registration is required
- REGISTRATION (STEP 1): Age \>= 18 years
- REGISTRATION (STEP 1): Eastern Cooperative Oncology Group (ECOG) performance status: 0-2
- REGISTRATION (STEP 1): Absolute neutrophil count (ANC) \>= 1,000/mm\^3
- REGISTRATION (STEP 1): Platelet count \>= 50,000/mm\^3
- REGISTRATION (STEP 1): Creatinine =\< 1.5 x upper limit of normal (ULN) OR calculated (calc.) creatinine clearance \>= 30 mL/min \
- Calculated using the Cockcroft-Gault equation
- REGISTRATION (STEP 1): Total bilirubin =\< 1.5 x ULN \
- If Gilbert's disease, use direct bilirubin instead of total bilirubin; direct bilirubin =\< 1.5 ULN if patient to receive FOLFIRI (leucovorin calcium, 5-fluorouracil, and irinotecan); direct bilirubin ≤ 3.0 x ULN if patient to receive mFOLFOX6 (leucovorin calcium, 5-fluorouracil, and oxaliplatin)
- REGISTRATION (STEP 1): Aspartate aminotransferase (AST)(serum glutamic-oxaloacetic transaminase \[SGOT\]) / alanine aminotransferase (ALT)(serum glutamate pyruvate transaminase \[SGPT\]) =\< 3.0 x ULN \
- In the event of metastatic liver disease, =\< 5 x ULN
- REGISTRATION (STEP 1): Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial. Note: HIV testing is not required for eligibility
- REGISTRATION (STEP 1): No other planned concurrent investigational agents while on study
Where
- Kingman, Arizona
- Phoenix, Arizona
- Beverly Hills, California
- Irvine, California
- Los Angeles, California
- Orange, California
- Sacramento, California
- Lewes, Delaware
- Millville, Delaware
- Newark, Delaware
- Rehoboth Beach, Delaware
- Wilmington, Delaware
And 137 more locations — see the full list below.
Collaborators
National Cancer Institute (NCI)
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Oct 2, 2026 · Source of record for eligibility and locations