NCT03448926 · PreludeDx
The PREDICT Registry:
What this study is about
This is a forward-looking, non-interventional (observational) group of participants study conducted within the medical network of the participating investigators and institutions. Patients meeting the eligibility criteria (see below) will be eligible for participation and the investigators will obtain written informed consent.
View original scientific description
This is a prospective, non-interventional (observational) cohort study conducted within the medical network of the participating investigators and institutions. Patients meeting the eligibility criteria (see below) will be eligible for participation and the investigators will obtain written informed consent. A central Institutional Review Board (IRB), WCG IRB, will approve the protocol and each participating institution.
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
- Patient must have histologically confirmed ductal carcinoma in situ (DCIS) in a single breast (presence of lobular carcinoma in situ (LCIS) or other benign breast disease in addition to DCIS is acceptable).
- Patient must have the DCISionRT test ordered during routine patient care.
- Patient must be eligible for or have recently completed breast conserving surgery.
- Patient must be eligible to receive radiation and/or systemic treatment.
- Patient must be 30 to 85 years old.
- Patient must have tumor size of less than 6 cm.
- Patient must have been diagnosed with DCIS within 120 days of consent.
Exclusion criteria
- Patient tissue is insufficient to generate DCISionRT test results or required DCISionRT inputs (age, tumor size, margin status, palpability) are missing.
- Patient has evidence of invasive breast cancer, including microinvasion, lymph node involvement, or Paget's disease of the nipple or suspicious mammogram findings in the lymph nodes or contralateral breast.
- Patient has been surgically treated with an ipsilateral mastectomy for primary DCIS.
- Patient has had any prior ipsilateral or contralateral breast DCIS or invasive breast cancer.
- Patient has a prior history of in-field radiation in the ipsilateral breast.
- Patient has had prior systemic endocrine or chemotherapy prior to testing.
- Patient is pregnant.
Where
- Scottsdale, Arizona
- La Jolla, California
- San Mateo, California
- Aurora, Colorado
- Jacksonville, Florida
- Tampa, Florida
- Atlanta, Georgia
- Evanston, Illinois
- Baltimore, Maryland
- Boston, Massachusetts
- Royal Oak, Michigan
- Troy, Michigan
And 16 more locations — see the full list below.
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 Apr 17, 2026 · Source of record for eligibility and locations