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Recruiting Phase 4 NCT05333328

NCT05333328 OFS in Premenopausal Node+ Breast Cancer With Low Genomic Risk

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Clinical Trial Summary
NCT ID NCT05333328
Status Recruiting
Phase Phase 4
Sponsor Gangnam Severance Hospital
Condition Breast Cancer
Study Type INTERVENTIONAL
Enrollment 418 participants
Start Date 2023-02-06
Primary Completion 2031-01

Eligibility & Interventions

Sex Female only
Min Age 20 Years
Max Age 50 Years
Study Type INTERVENTIONAL
Interventions
Ovarian function suppression with endocrine treatments

Eligibility Fast-Check

Enter your details for a quick preliminary check. This does not replace medical advice.

What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 4 studies follow an already-approved treatment in real-world conditions to monitor long-term safety and effectiveness.

This trial targets 418 participants in total. It began in 2023-02-06 with a primary completion date of 2031-01.

⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.

Brief Summary

Among ER+HER2- premenopausal patients with N1 who undergoes primary breast surgery, we will identify the patients with a genomic low risk using the multigene-assay (OncoFREE®). In these, ovarian function suppression with endocrine therapies including either tamoxifen or aromatase-inhibitors will be administered for 5 years.

Eligibility Criteria

Inclusion Criteria: * ER+HER2- breast cancer * Premenopausal and age \<=50 * T1 or T2 * N1 including micrometastasis * Genomic Low Risk by OncoFREE test® (1-20) Exclusion Criteria: * Postmenopausal women * ER-negative breast cancer

Contact & Investigator

Central Contact

Sung Gwe Ahn, M.D.,Ph.D.

✉ asg2004@yuhs.ac

📞 0220193370

Principal Investigator

Sung Gwe Ahn, M.D.,Ph.D.

PRINCIPAL INVESTIGATOR

Gangnam Severance Hospital

Frequently Asked Questions

Who can join the NCT05333328 clinical trial?

This trial is open to female participants only, aged 20 Years or older, up to 50 Years, studying Breast Cancer. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.

What phase is the NCT05333328 trial and what does that mean for participants?

Phase 4 studies are conducted after a treatment has been approved. They monitor long-term safety and real-world effectiveness in a broader patient population.

Is NCT05333328 currently recruiting?

Yes, NCT05333328 is actively recruiting participants. Contact the research team at asg2004@yuhs.ac for enrollment information.

Where is the NCT05333328 trial being conducted?

This trial is being conducted at Seoul, South Korea, Seoul, South Korea.

Who is sponsoring the NCT05333328 clinical trial?

NCT05333328 is sponsored by Gangnam Severance Hospital. The principal investigator is Sung Gwe Ahn, M.D.,Ph.D. at Gangnam Severance Hospital. The trial plans to enroll 418 participants.

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ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer  ·  Last Reviewed: April 2026  ·  Data Methodology