OncRef

Clinical Trial: NCT03425838

Endocrine Therapy Plus CDK4/6 in First or Second Line for Hormone (SONIA) Receptor Positive Advanced Breast Cancer

Status:

ACTIVE NOT RECRUITING

Phase:

Phase 3

Lead Sponsor:Borstkanker Onderzoek Groep
Information Provided By:Borstkanker Onderzoek Groep
Last Update Posted:2026-05-20

Study Overview

Brief Summary

Given the uncertain benefit in efficacy of adding CDK 4/6 to first rather than second line endocrine treatment, the aim of this project is to evaluate whether the sequence of an aromatase inhibitor plus CDK 4/6 in first line followed by fulvestrant in second line is superior to the sequence of an aromatase inhibitor in first line followed by fulvestrant plus CDK4/6 in second line.

Official Title

BOOG 2017-03: Endocrine Therapy Plus CDK 4/6 Inhibition in First- or Second-line for Hormone Receptor Positive Advanced Breast Cancer - the SONIA Study

Conditions

Breast Neoplasm Female

Intervention / Treatment

  • Drug: CDK 4/6 inhibitor
  • Drug: Non-Steroidal Aromatase Inhibitor
  • Drug: Fulvestrant

Other Study ID Numbers

  • BOOG 2017-03
  • 2017-002334-23
  • 2017

Start Date (Actual)

2017-11-09

Primary Completion Date (Actual)

2023-03-06

Study Completion Date (Estimated)

2028-12

Enrollment (Actual)

1050

Study Type

Interventional

Phase

Phase 3