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CDK4/6 Inhibitor

Hormone Therapy for Male Breast Cancer

Phase 2
Recruiting
Led By Jose Pablo Leone, MD
Research Sponsored by Jose Pablo Leone
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Patients with a history of ipsilateral or contralateral DCIS or LCIS are eligible
ECOG performance status ≤ 2
Timeline
Screening 3 weeks
Treatment Varies
Follow Up 3 years
Awards & highlights

Study Summary

This trial is testing how well male breast cancer responds to different hormone therapies before surgery, to see which regimen is the most effective.

Who is the study for?
This trial is for men aged 18+ with invasive breast cancer that's hormone receptor-positive and HER2-negative, who haven't had surgery yet. Participants must be able to take oral meds, have certain organ function levels, and use contraception if with a partner of childbearing potential. Excluded are those with serious medical conditions, active infections, inflammatory breast cancer or recent treatments for other cancers.Check my eligibility
What is being tested?
The ETHAN study tests how male breast cancer responds to preoperative endocrine therapy. It compares the effectiveness of Tamoxifen, Anastrozole, Degarelix, and Abemaciclib in treating this condition before surgery.See study design
What are the potential side effects?
Possible side effects include hot flashes and mood swings from Tamoxifen; joint pain and osteoporosis from Anastrozole; injection site reactions from Degarelix; fatigue, diarrhea and low white blood cell counts from Abemaciclib.

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
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I have had ductal or lobular carcinoma in situ in either breast.
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I can take care of myself but might not be able to do heavy physical work.
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My breast cancer is hormone receptor-positive and HER2-negative.
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My blood and organ function tests are within the required ranges.
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I am a man over 18 with invasive breast cancer and have not had surgery to remove the tumor or lymph nodes.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~3 years
This trial's timeline: 3 weeks for screening, Varies for treatment, and 3 years for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Change in Ki-67
RCB index
Secondary outcome measures
Changes in estradiol levels
Changes in testosterone levels
Preoperative Endocrine Prognostic Index (PEPI) score
Other outcome measures
Adapted EORTC BR23 questionnaire
EORTC QLC-C30 questionnaire
Grade 3 or Higher Treatment-Related Toxicity Rate
+2 more

Trial Design

7Treatment groups
Experimental Treatment
Group I: Window Phase Arm C: Anastrozole + DegarelixExperimental Treatment2 Interventions
Participants will be randomly assigned to receive Anastrozole 1x daily for 3 weeks (21days) and Degarelix on day 1 only.
Group II: Window Phase Arm B: AnastrozoleExperimental Treatment1 Intervention
Participants will be randomly assigned to receive Anastrozole 1x daily for 3 weeks (21days).
Group III: Window Phase Arm A: TamoxifenExperimental Treatment1 Intervention
Participants will be randomly assigned to receive Tamoxifen 1x daily for 3 weeks (21days).
Group IV: Neoadjuvant Phase Arm G: Anastrozole + Degarelix + AbemaciclibExperimental Treatment3 Interventions
Participants will be randomly assigned to receive Anastrozole 1x daily, Degarelix on day 1 of each cycle and Abemaciclib 2x daily for 4 cycles (4 months); each study cycle is 28 days.
Group V: Neoadjuvant Phase Arm F: Anastrozole and DegarelixExperimental Treatment2 Interventions
Participants will be randomly assigned to receive Anastrozole 1x daily and Degarelix on day 1 of each cycle for 4 cycles (4 months); each study cycle is 28 days.
Group VI: Neoadjuvant Phase Arm E: Tamoxifen + AbemaciclibExperimental Treatment2 Interventions
Participants will be randomly assigned to receive Tamoxifen 1x daily and Abemaciclib 2x daily for 4 cycles (4 months); each study cycle is 28 days.
Group VII: Neoadjuvant Phase Arm D: TamoxifenExperimental Treatment1 Intervention
Participants will be randomly assigned to receive Tamoxifen 1x daily for 4 cycles (4 months); each study cycle is 28 days.
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
Degarelix
2002
Completed Phase 3
~3600
Anastrozole
2019
Completed Phase 4
~10300
Tamoxifen
2005
Completed Phase 4
~30070
Abemaciclib
2019
Completed Phase 2
~1710

Find a Location

Who is running the clinical trial?

Jose Pablo LeoneLead Sponsor
Eli Lilly and CompanyIndustry Sponsor
2,619 Previous Clinical Trials
3,206,536 Total Patients Enrolled
64 Trials studying Breast Cancer
36,904 Patients Enrolled for Breast Cancer
Translational Breast Cancer Research Consortium (TBCRC)UNKNOWN

Media Library

Abemaciclib (CDK4/6 Inhibitor) Clinical Trial Eligibility Overview. Trial Name: NCT05501704 — Phase 2
Breast Cancer Research Study Groups: Neoadjuvant Phase Arm G: Anastrozole + Degarelix + Abemaciclib, Neoadjuvant Phase Arm F: Anastrozole and Degarelix, Neoadjuvant Phase Arm D: Tamoxifen, Neoadjuvant Phase Arm E: Tamoxifen + Abemaciclib, Window Phase Arm B: Anastrozole, Window Phase Arm A: Tamoxifen, Window Phase Arm C: Anastrozole + Degarelix
Breast Cancer Clinical Trial 2023: Abemaciclib Highlights & Side Effects. Trial Name: NCT05501704 — Phase 2
Abemaciclib (CDK4/6 Inhibitor) 2023 Treatment Timeline for Medical Study. Trial Name: NCT05501704 — Phase 2

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Is enrollment still available for this experiment?

"According to clinicaltrials.gov, this experiment is no longer recruiting individuals as the last update was posted on August 12th 2022. Although recruitment for this study has ended, there are still 2282 other trials actively searching for volunteers."

Answered by AI

To what extent could Tamoxifen potentially harm patients?

"Tamoxifen is rated with a score of 2 since the Phase 2 trial indicates some safety data but lack any evidence regarding efficacy."

Answered by AI
~40 spots leftby Apr 2026