The AUS-PREDICT Registry for DCIS Patients With DCISionRT Testing (AUS-PREDICT)

A Prospective Registry Studyto Evaluate the Effect of the DCISionRT Test on Treatment Decisions in Patients With DCIS Following Breast Conserving Therapy

This is a prospective cohort study for patients diagnosed with ductal carcinoma in situ (DCIS) of the breast. The primary objective of the study is to create a de-identified database of patients, test results, treatment decisions and outcomes that can be queried to determine the utility of the DCISionRT™ test in the diagnosis and treatment of ductal carcinoma in situ of the breast.

Study Overview

• Status: Active, not recruiting
• Conditions: DCIS
• Intervention / Treatment: Diagnostic test: DCISionRT Test

Detailed Description

This is a prospective cohort study conducted within the medical network of the participating investigators and institutions. Patients meeting the eligibility criteria outlined above will be eligible for participation and the investigators will obtain written informed consent. A central Institutional Review Board (IRB) will approve the protocol and each participating institution.

After diagnosis of DCIS, the most representative tissue block (or 10 sections mounted on charged slides cut at 3 microns) will be sent to PreludeDx for DCISionRT. The most representative specimen should be selected from tissue collected via direct tumor biopsy (either FNA, core needle or excisional biopsy) as part of routine patient care. Patients must be enrolled in the study and the enrollment and pre-testing data forms must be completed and submitted before the DCISionRT results are reported. Then, after review of the DCISionRT results, the investigators complete and submit the post-testing data form. The patient may then be followed for up to 10 years (or until death).

All study data will be stored in an encrypted, HIPAA-compliant database maintained by the sponsor. Each consented patient will be assigned a unique Study ID number. Study personnel at each institution will maintain a key to link the Study IDs of its own patients to the patients' local medical record number. All personal health information (PHI) will remain at the local institution and only de-identified data will be uploaded to the national registry. No genetic test results that may be used to identify the patient will be included in the database.

This study anticipates the participation of up to 150 sites within Australia with each site enrolling between 10 and 100 patients. The study is designed to collect information for up to 1,500 patients.

The purpose of this study is to create a de-identified database of patients, test results, treatment decisions and outcomes that can be queried to determine the clinical utility of the DCISionRT™ Test in the management of DCIS, as it is broadly incorporated into clinical practice. The primary objective is to identify a statistically significant difference in physician treatment recommendations for patients diagnosed with DCIS and treated with breast conserving surgery based on availability of the DCISionRT test results. The primary endpoints are treatment recommendations according to standard procedure at each clinical site both pre- and post-DCISionRT results.

Secondary endpoints include the percent of patients for which the recommended treatment before DCISionRT results and after DCISionRT results differ as a function of clinical factors, such as age groups (<40, 40-50 and >50), grade (I, II, III), and tumor size (>1cm, >2.5cm, >4cm). Other analyses involve the identification of key driver(s) of treatment recommendation, such as age, ethnicity, race, family history, presentation (screening/clinical), grade, architecture, necrosis, tumor size, palpability, number of excisions, surgical margin, hormone receptor status, HER2 status; distribution of DCISionRT scores across the cohort; and identification of key driver(s) of treatment recommendation based on geographic region of the investigator.

The study population will be selected from the clinical practices of the participating investigators and institutions. Patients who have been recently diagnosed with DCIS and are being evaluated for the need for further therapy will be screened for eligibility per the following eligibility criteria.

• Study Type: Observational
• Enrollment (Estimated): 1500

Contacts and Locations

Study Locations

• Australia
  • New South Wales
    • Alexandria, New South Wales, Australia, 2015
      • GenesisCare
  • Victoria
    • Parkville, Victoria, Australia, 3050
      • Royal Melbourne Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 26 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

The study population will be selected from the clinical practices of the participating investigators and institutions. Patients who have been recently diagnosed with DCIS and are being evaluated for the need for further therapy will be screened for eligibility per the following eligibility criteria.

Description

Inclusion Criteria:

1. A clinical decision has been made to order the DCISionRT™ Test as part of routine patient care
2. 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)
3. Patient must be consented within 120 days after surgery
4. Patient must be eligible for, or have already received breast conserving surgery
5. Patient must be eligible to receive radiation and/or systemic treatment
6. Patient must be female and greater than 25 years old
7. Patient must be able to provide informed consent

Exclusion Criteria:

1. Patient tissue is insufficient to generate DCISionRT test results or required DCISionRT inputs (age, tumor size, margin status, palpability) are missing
2. Patient has invasive breast cancer or evidence in the ipsilateral or contralateral breast of invasive breast cancer, including microinvasion, lymph node involvement, or Paget's disease of the nipple
3. Patient has already been surgically treated with a mastectomy for primary DCIS
4. Patient has prior in situ or invasive breast cancer

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

Intervention / Treatment

Ductal Carcinoma In Situ (DCIS); Patients must have histologically confirmed ductal carcinoma in situ (DCIS) in a single breast without evidence of invasive cancer (presence of lobular carcinoma in situ (LCIS) or other benign breast disease in addition to DCIS is acceptable).

Diagnostic test: DCISionRT Test; The Prelude DCISionRT Test was developed by Prelude Corporation and is performed at its CLIA laboratory facility. The biomarkers used to evaluate the biologic signature of DCIS tissue are based on over a decade of research including the University of California, San Francisco, Yale University as well as Prelude Corporation. The test is prognostic for 10-year recurrence risk and predicts RT treatment benefit for invasive breast cancer. The laboratory is regulated under the Clinical Laboratory Improvement Amendments of 1988 (CLIA) as qualified to perform high-complexity clinical testing and is accredited by the College of American Pathologists (CAP).

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percent of Cases with Changes in Treatment Recommendation	The study will collect details on physician treatment recommendations before and after availability of the genomic test (DCISionRT) results. The data elements include type of surgery (lumpectomy, therapeutic mastectomy, contralateral prophylactic mastectomy), type of radiation therapy (none, IORT, APBI, whole breast RT) and endocrine therapy (yes, no). The main measure will be percent of cases in which treatment recommendations are changed after the test results become available.	5 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Function of Demographic Factors	Percent of patients for which the recommended treatments change after DCISionRT results are known as a function of demographic factors (age groups <40, 40-50 and >50; ethnicity; family history)	5 years
Function of Tumor Factors	Percent of patients for which the recommended treatments change after DCISionRT results are known as a function of tumor factors (tumor size, grade, architecture, necrosis, palpability, surgical margins, hormone receptor status).	5 years

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Distribution of DCISionRT scores across the cohort	Each patient will receive the following results from the DCISionRT test: Risk Score (0 - 10.0), Risk Category Low (<=3.0) or Elevated (>3.0), Risk Prognosis with Breast Conserving Therapy Alone (0 - 40%) and Risk Prognosis with Breast Conserving Therapy and Radiation (0 - 40%).	5 years
Function of Geographic Region	Percent of patients for which the recommended treatments change after DCISionRT results are known as a function of the geographic region of the investigator.	5 years

Collaborators and Investigators

• Sponsor: PreludeDx
• Investigators: Principal Investigator: Troy Bremer, Prelude Corp

Publications and helpful links

General Publications

• Bremer et al. Cancer Research. Feb 2017. Vol 77 Issue 4 Supp. SABCS16-S5-0.1

Study record dates

Study Major Dates

• Study Start (Actual): July 2, 2021
• Primary Completion (Actual): July 30, 2025
• Study Completion (Estimated): December 1, 2035

Study Registration Dates

• First Submitted: June 1, 2021
• First Submitted That Met QC Criteria: June 1, 2021
• First Posted (Actual): June 8, 2021

Study Record Updates

• Last Update Posted (Actual): April 3, 2026
• Last Update Submitted That Met QC Criteria: April 1, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Breast Carcinoma In Situ; Neoplasms; Neoplasms by Histologic Type; Neoplasms, Glandular and Epithelial; Adenocarcinoma; Carcinoma; Neoplasms, Ductal, Lobular, and Medullary; Carcinoma in Situ; Carcinoma, Intraductal, Noninfiltrating
• Other Study ID Numbers: P2101 (METC Number); U1111-1266-0439 (Other Identifier: World Health Organisation)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED
• IPD Plan Description: There is no current plan to govern sharing of IPD. Interested researchers should contact Principal Investigators.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes
• product manufactured in and exported from the U.S.: No