AzTrials
AzTrials

Breast CancerELENINCT07563595

Elacestrant in Patients With ER+ HER2- ESR1-mutated Locally Advanced or Metastatic Breast Cancer

An observational study of Breast Cancer, run by iOMEDICO AG at 3 sites in Germany.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

The objective of this non-interventional study (NIS) is to evaluate prevalence of ESR1 mutation after endocrine therapy in the palliative setting, quality of life, tolerability, and safety and to describe treatment detail and adverse event (AE) management in postmenopausal women with locally advanced and/or metastatic… Read more about this study

Who is it for?
Ages 18 years and older, women only
Conditions the study is for
Breast Cancer
What is being tested?
Elacestrant
How many people
500 participants
Where
3 sitesGermany
Study dates
19 Jun 2026to Jun 2028
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Study population: Postmenopausal women with locally advanced and/or metastatic estrogen receptor-positive (ER+) human epidermal growth factor receptor 2-negative (HER2)- breast cancer with disease progression on endocrine therapy and cyclin-dependent kinase inhibitor (CDKi) and intention for second line (2L) treatment with elacestrant according to summary of product characteristics (SmPC).

Who may be able to join

  • Signed and dated informed consent form
  • Postmenopausal women
  • Age ≥18 years
  • Eastern Cooperative Oncology Group Performance Status (ECOG) < 2
  • Locally advanced and/or metastatic ER+ HER2- breast cancer
  • Histologically proven ER positivity (defined as ≥1% staining by immunohistochemistry (IHC))
Show all 10Show fewer
  • Histologically proven HER2 negativity (defined as a IHC0 or IHC1+ score by IHC or a negative result by in situ hybridization (ISH), optionally combined with a IHC2+ score)
  • Disease progression following first line ET + CDKi
  • No more than one prior ET line in the advanced/metastatic setting and intention for 2nd-line treatment with elacestrant according to current elacestrant SmPC as assessed by the treating physician (ESR1 testing can be done after inclusion)
  • For patients with proven ESR1mut: Study inclusion the latest 2 weeks after start of elacestrant treatment

Who cannot join

  • Prior chemotherapy in the advanced/metastatic setting
  • Contraindications according to elacestrant SmPC, except for ESR1 test result for patients included prior to ESR1 testing.
  • Participation in an interventional clinical trial within 30 days prior to enrolment or simultaneous participation in an interventional clinical trial (except follow-up phase)

Trial locations and contacts

3 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Laura Serrer contact

+49761152420

eleni@iomedico.com

Germany3 sites, 3 recruiting
  • Praxis für interdisziplinäre Onkologie & Hämatologie

    Freiburg im Breisgau, 79110

    Patrick Marschner, +49761386870, klifo@onkologie-freiburg.de

    Recruiting
  • St. Louise Frauen- und Kinderklinik

    Paderborn, 33098

    Michael P Lux, +49 5251864121, M.Lux@vincenz.de

    Recruiting
  • Gemeinschaftspraxis für Hämatologie und Onkologie

    Ravensburg, 88212

    Thomas Decker, +49 751 366197-0, thomas.decker@onkonet.eu

    Recruiting

Other trials in Germany

About this study

Official title: Elacestrant in Patients With ER+ HER2- ESR1-mutated Locally Advanced or Metastatic Breast Cancer: a Multicenter, National, Prospective Non-interventional Study

The objective of this non-interventional study (NIS) is to evaluate prevalence of ESR1 mutation after endocrine therapy in the palliative setting, quality of life, tolerability, and safety and to describe treatment detail and adverse event (AE) management in postmenopausal women with locally advanced and/or metastatic ER+ HER2- ESR1-mutated breast cancer and second line treatment with elacestrant according to SmPC (Summary of product characteristics) in a real-world setting.

Conditions
Breast Cancer
Being tested
Elacestrant, Standard of care (Investigator Choice)
Keywords
Elacestrant, advanced breast cancer, Quality of life, ESR1 Mutation, Orserdu
Medical subject headings
Breast Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ElacestrantDrug

    Also called Orserdu®

    According to the Summary of Product Characteristics (SmPC)

  • Standard of care (Investigator Choice)Drug

    Treatment decision of investigator

Study groups in NCT07563595
Study groupRoleWhat they receive
ESR1 wildtypePatients with a ESR1 wildtype tumor
Receives: Drug: Standard of care (Investigator Choice)
ESR1 mutatedPatients with a ESR1 mutated tumor
Receives: Drug: Elacestrant

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change from baseline in EORTC global health scale

    Change from baseline quality of life (QoL) over time for the global health scale of the EORTC QLQ- C30 questionnaire The EORTC QLQ- C30 global health scale ranges from 0 to 100, with higher scores indicating better quality of life.

    Measured: From Time of enrollment until month 11

Secondary outcomes (36)
  1. Time to deterioration in global health scale (EORTC QLQ-C30)

    Time to deterioration in global health scale of EORTC QLQ-C30 The EORTC QLQ- C30 global health scale ranges from 0 to 100, with higher scores indicating better quality of life.

    Measured: From Time of enrollment until month 11

  2. Time to deterioration in functional scores (EORTC QLQ-C30)

    Time to deterioration in functional scores of EORTC QLQ-C30. The EORTC QLQ- C30 functional score ranges from 0 to 100, with higher scores indicating better quality of life.

    Measured: From Time of enrollment until month 11

  3. Time to deterioration in symptom scores (EORTC QLQ-C30)

    Time to deterioration in symptom scores of EORTC QLQ-C30 The EORTC QLQ- C30 symptom score ranges from 0 to 100, with lower scores indicating better quality of life.

    Measured: From Time of enrollment until month 11

  4. Change from baseline in functional and symptom scores

    Change from baseline in functional and symptom scores of EORTC QLQ-C30 The EORTC QLQ- C30 functional and symptom scores ranges from 0 to 100, with higher scores indicating better quality of life (for functional scores), and lower indication better quality of life for symptom scores.

    Measured: From Time of enrolment until up to 11 months after enrolment.

  5. Change from baseline in visual analogue scale (VAS)

    Change from baseline in EQ-5D-5L visual analogue scale (VAS); The EQ-5D-5L VAS ranges from 0 to 100, with higher scores indicating better quality of life.

    Measured: From Time of enrollment until month 11.

  6. Change from baseline in index value

    Change from baseline in EQ-5D-5L Index Value The EQ-5D-5L index value ranges from -0.661 to 1, with higher scores indicating better quality of life.

    Measured: From Time of enrollment until month 11.

  7. Change from baseline in all scales of EQ-5D-5L

    Change from baseline in all scales of EQ-5D-5L The scales of EQ-5D-5L range from 1 to 5, with lower scores indicating better quality of life.

    Measured: From Time of enrollment until month 11.

  8. Prevalence of ESR1 mutation

    Assess prevalence of ESR1mut in patients intended for elacestrant treatment as well as the testing methodology and results for ESR1 mutations.

    Measured: Baseline

  9. Drug safety: Frequency

    Frequency of specific (serious) adverse drug reactions ((S)ADRs) (nausea, vomiting, decreased appetite)

    Measured: From time of treatment start until 30 days after end of elacestrant treatment

  10. Drug safety: Incidence of adverse events

    Incidence of (serious) adverse events ((S)AEs), (serious) adverse drug reactions ((S)ADRs)

    Measured: From time of treatment start until 30 days after end of elacestrant treatment

  11. Drug safety: Change from baseline in AST (Aspartate Aminotransferase)

    Change from baseline in AST

    Measured: From time of treatment start until 30 days after end of elacestrant treatment (max. 24 months)

  12. Drug safety: Change from baseline in ALT (Alanine Aminotransferase)

    Change from baseline in ALT

    Measured: From time of treatment start until 30 days after end of elacestrant treatment (max. 24 months)

  13. Drug safety: Change from baseline in bilirubin

    Change from baseline in bilirubin

    Measured: From time of treatment start until 30 days after end of elacestrant treatment (max. 24 months)

  14. Patients and disease characteristics: Age

    Assess patients characteristics in patients with intention for treatment with elacestrant: Age (descriptive statistics, categorical (</≥ 65))

    Measured: Baseline

  15. Patients and disease characteristics: Body mass index (BMI)

    Assess patients characteristics in patients with intention for treatment with elacestrant: BMI (descriptive statistics, categorical (underweight, normal weight, overweight, obese))

    Measured: Baseline

  16. Patients and disease characteristics: ECOG Performance status

    Assess patients characteristics in patients with intention for treatment with elacestrant: ECOG Performance status

    Measured: Baseline

  17. Patients and disease characteristics: CCI (Charlson score and contributing diseases)

    Assess patients characteristics in patients with intention for treatment with elacestrant: CCI (Charlson score and contributing diseases)

    Measured: Baseline

  18. Patients and disease characteristics: Time since diagnosis

    Assess disease characteristics in patients with intention for treatment with elacestrant: Time since diagnosis (descriptive statistics)

    Measured: Baseline

  19. Patients and disease characteristics: TNM staging

    Assess disease characteristics in patients with intention for treatment with elacestrant: TNM staging (including AJCC) at initial diagnosis

    Measured: Baseline

  20. Patients and disease characteristics: Metastatic sites

    Assess disease characteristics in patients with intention for treatment with elacestrant: • Metastatic sites at inclusion

    Measured: Baseline

  21. Patients and disease characteristics: Tumor Grading

    Assess disease characteristics in patients with intention for treatment with elacestrant: Tumor Grading at initial diagnosis and inclusion

    Measured: Baseline

  22. Patients and disease characteristics: HR and HER2 status

    Assess disease characteristics in patients with intention for treatment with elacestrant: HR status and HER2 status at initial diagnosis and at inclusion

    Measured: Baseline

  23. Patients and disease characteristics: Prior adjuvant chemotherapy

    Assess disease characteristics in patients with intention for treatment with elacestrant: Prior adjuvant chemotherapy

    Measured: Baseline

  24. Patients and disease characteristics: Prior adjuvant endocrine therapy

    Assess disease characteristics in patients with intention for treatment with elacestrant: Prior adjuvant endocrine therapy

    Measured: Baseline

  25. Patients and disease characteristics: prior CDKi/endocrine therapy in the palliative setting

    Assess disease characteristics in patients with intention for treatment with elacestrant: Type and duration of prior CDKi/endocrine therapy in the palliative setting (descriptive statistics, categorical ≤6 months / >6 months; ≤12 months / >12 months)

    Measured: Baseline

  26. Patients and disease characteristics: Disease site

    Assess disease characteristics in patients with intention for treatment with elacestrant: Disease site (bone-only / visceral / non-visceral (not bone-only)) at inclusion

    Measured: At time of enrollment

  27. Patients and disease characteristics: concomitant diseases

    Assess disease characteristics in patients with intention for treatment with elacestrant: concomitant diseases

    Measured: Baseline

  28. Use of concomitant medication

    Assess the use of concomitant medication during treatment with elacestrant.

    Measured: max. 24 months; from the patient-specific study start to end of study (during elacestrant treatment)

  29. Assess parameters of physicians' treatment decision making using a questionnaire

    Frequency of distinct parameters affecting therapy choice; questionnaire completed by treating physician.

    Measured: Baseline

  30. Frequency of first subsequent systemic antineoplastic therapy for ESR1wt patients and ESR1mut patients without elacestrant treatment

    Assess second-line treatments for all patients by ESR1 status (Frequency of first subsequent systemic antineoplastic therapy for ESR1wt patients and ESR1mut patients without elacestrant treatment (refers to first treatment received starting from second line)

    Measured: max. 24 months; at patient patient-specific start of treatment

  31. Details on treatment with elacestrant: reason for end of treatment

    Assess reason for end of treatment (treatment with elacestrant)

    Measured: max. 24 months; from the patient-specific study start to end of study (during elacestrant treatment)

  32. Details on treatment with elacestrant: dose intensity

    Assess dose intensity (treatment with elacestrant) as prescribed by the treating physician

    Measured: max. 24 months; from the patient-specific study start to end of study (during elacestrant treatment)

  33. Details on treatment with elacestrant: frequency and type of dose modification

    Assess Frequency and type of dose modifications (dose reductions, interruptions) compared to SmPC of elacestrant.

    Measured: max. 24 months; from the patient-specific study start to end of study (during elacestrant treatment)

  34. Details on treatment with elacestrant: reasons for dose modifications and interruptions

    Assess reasons for dose modifications and interruptions (elacestrant treatment)

    Measured: max. 24 months; from the patient-specific study start to end of study (during elacestrant treatment)

  35. Treatments following elacestrant therapy: Type of first subsequent systemic antineoplastic therapy

    Details on treatments following elacestrant therapy (Type of first subsequent systemic antineoplastic therapy)

    Measured: max. 24 months; from the patient-specific end of elacestrant treatment until end of study

  36. Treatments following elacestrant therapy: Frequency of first subsequent systemic antineoplastic therapy

    Details on treatments following elacestrant therapy:Frequency of first subsequent systemic antineoplastic therapy for ESR1mut patients (refers to first treatment received after Elacestrant so starting from third line)

    Measured: max. 24 months; from the patient-specific end of elacestrant treatment until end of study

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted4 May 2026
  2. Study start19 Jun 2026
  3. Primary completionJun 2028 (estimated)
  4. Study completionJun 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case only
Time perspective
Prospective
Enrolment
500 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07563595
Sponsor's protocol ID
IOM-090506
Acronym
ELENI
Status last verified
Jun 2026
First submitted
2 Dec 2025
Last updated
25 Jun 2026
Results posted
No
Data monitoring committee
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

An observational study of Breast Cancer, run by iOMEDICO AG at 3 sites in Germany.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 10 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 25 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Laura Serrer (+49761152420, eleni@iomedico.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change from baseline in EORTC global health scale (time frame: From Time of enrollment until month 11). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Jun 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in