NCT06325046 · Mayo Clinic
Adaptive Radiation Therapy (ART) Stereotactic Ablative Body Radiotherapy (SABR) for Primary Localized Prostate Cancer
What this study is about
This clinical trial evaluates changes in quality of life after two treatments with near margin-less adaptive radiation therapy (ART) compared to five treatments with standard stereotactic ablative body radiotherapy (SABR) in patients with prostate cancer that has not spread to other parts of the body (localized).
View original scientific description
This clinical trial evaluates changes in quality of life after two treatments with near margin-less adaptive radiation therapy (ART) compared to five treatments with standard stereotactic ablative body radiotherapy (SABR) in patients with prostate cancer that has not spread to other parts of the body (localized). ART is a type of radiation therapy that uses information gathered during the treatment cycle to inform, guide, and alter future radiation treatments with respect to location and dose. It may be able to deliver radiation to the site of disease over a shorter time and with smaller margins (less treatment delivered to nearby healthy tissues). SABR is a type of external radiation therapy that uses special equipment to position a patient and precisely deliver radiation to tumors in the body (except the brain). The total dose of radiation is divided into smaller doses given over several days. This type of radiation therapy helps spare normal tissue. Shorter duration near margin-less ART may be just as effective at treating patients with localized prostate cancer but have less quality of life side effects than standard SABR.
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
- Gender assigned male at birth: age ≥ 18 years
- Histological confirmation of prostate adenocarcinoma
- National Comprehensive Cancer Network (NCCN) (Prostate Cancer version 4.2022) low- to intermediate-risk prostate adenocarcinoma
- Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2
- Ability to complete questionnaire(s) by themselves or with assistance
- Signed informed consent
- Willing to complete requirements for follow-up (during active monitoring phase)
Exclusion criteria
- NCCN (Prostate Cancer version 4.2022) very low-, high-, or very high-risk prostate adenocarcinoma
- Prior definitive treatment of prostate cancer including radiotherapy, prostatectomy, cryotherapy, or high intensity focused ultrasound (HIFU)
- Prior bladder outlet obstruction procedures including transurethral resection of the prostate (TURP), Holmium laser enucleation of the prostate (HoLEP), transurethral vaporesection of the prostate (TUVRP), etc.
- Metastatic disease by conventional or molecular imaging
- Contraindications to radiation therapy (RT) including uncontrolled inflammatory bowel disease, ATM mutation, and Xeroderma pigmentosum mutation
- Concurrent antineoplastic agents (chemotherapy)
- Previous or concurrent malignancy other than non-melanoma skin cancer, indolent lymphoma, or chronic myelogenous leukemia, unless continuously disease-free ≥ 5 years
- Medical or psychiatric conditions that preclude informed decision-making or adherence with the protocol-defined treatment or follow-up
- Prostate gland volume \> 80 cc based on magnetic resonance imaging (MRI), and/or International Prostate Symptom Score (IPSS) composite score \> 17
- Body weight \> 200 kilogram
- Known allergy or sensitivity to polyethylene glycol (PEG) or iodine
Where
- Albert Lea, Minnesota
- Mankato, Minnesota
- Rochester, Minnesota
- Eau Claire, Wisconsin
- La Crosse, Wisconsin
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 Mar 31, 2026 · Source of record for eligibility and locations