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NCT04797299 · ClinicalTrials.gov record · last posted 2026-08-14

Prospective Evaluation of Breast-Conserving Surgery Alone in Low-Risk Ductal Carcinoma in Situ (DCIS)

Name: Prospective Evaluation of Breast-Conserving Surgery Alone in Low-Risk Ductal Carcinoma in Situ (DCIS) — clinical trial record (NCT04797299)
Creator: DataLookout
License: https://creativecommons.org/licenses/by/4.0/

Study acronym: ELISA

StatusRecruiting

PhaseNot specified

SponsorOntario Clinical Oncology Group (OCOG)

Started2022-11-23

View on ClinicalTrials.gov ↗

from the ClinicalTrials.gov record

To evaluate whether the combination of clinicopathological factors and the use of the Oncotype DX DCIS score can avoid radiation in women with low risk DCIS who have had breast conserving surgery (BCS)

Amendment record 34 amendments on the ClinicalTrials.gov record

This ClinicalTrials.gov record has been amended 34 times since 2021-03-10; most recent amendment 2026-07-15. DataLookout shows field-level changes from the day a trial enters its daily monitoring; earlier amendments are counted here from the ClinicalTrials.gov version history. See every version on ClinicalTrials.gov ↗

2022-10-20

Status change Not Yet Recruiting→Recruitingv6

Trial Details

NCT Number	NCT04797299
Lead Sponsor	Ontario Clinical Oncology Group (OCOG) Collaborators: Canadian Institutes of Health Research (CIHR), Hamilton Health Sciences Corporation
Conditions	DCIS
Enrollment	526 participants
Start Date	2022-11-23
Primary Completion	2030-11-30 (estimated)
Study Completion	2035-11-30 (estimated)
Updated on ClinicalTrials.gov	2026-08-14