BEYOND Study: A Multicentre, Prospective, Observational Study of Real-world Treatment Patterns and Outcomes of Trastuzumab Deruxtecan in Patients With HR Positive, HER2-low or Ultra-low Metastatic Breast Cancer Previously Treated With Endocrine Therapy (BEYOND)

May 13, 2026 updated by: AstraZeneca

A Multicentre, Prospective, Observational Study of Real-world Treatment Patterns and Outcomes of Trastuzumab Deruxtecan in Patients With HR Positive, HER2-low or Ultra-low Metastatic Breast Cancer Previously Treated With Endocrine Therapy

BEYOND study is designed to generate the first real-world data from GCC countries on the patient characteristics, treatment patterns, survival outcomes, and safety of T-DXd in patients with HRpositive,HER2-low or HER2-ultralow mBC previously treated with ET. The evidence generated will help to optimise treatment strategies, inform clinical guidelines, and ultimately improve outcomes for patients with mBC across the region.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
109

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United Arab Emirates
      • Abu Dhabi, United Arab Emirates
        • Research Site
      • Al Ain City, United Arab Emirates
        • Research Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Probability Sample

Study Population

The study population will consist of adult (age ≥ 18 years old at the date of T-DXd initiation) female patients with a confirmed diagnosis of HR-positive, HER2-low (defined as immunohistochemistry [IHC] 1+ or IHC 2+/In situ hybridization [ISH]-) or HER2-ultralow (IHC 0 with membrane staining) mBC that has progressed on one or more ET in the metastatic setting and initiated T-DXd up to 30 days before the index date.

Description

Inclusion Criteria:

  • -Female patients aged ≥18 years old at the time of T-DXd initiation
  • Patients with a confirmed histological or cytologically based diagnosis of HR-positive mBC.
  • Patients who were classified as HER2-low or HER2-ultralow mBC confirmed by the closest locally obtained HER2 test prior to or on the index date, and who meet the following definitions:
  • HER2-low status defined as IHC scores 1+ and 2+ without ISH gene amplification based on the pathology report.
  • HER2-ultralow status defined as IHC 0 with membrane staining based on the pathology report.
  • Patient who received at least one prior line of ET (± targeted therapy) in the metastatic setting.
  • Patients who are chemotherapy-naïve in the metastatic setting.
  • Patients who initiated T-DXd up to 30 days before the signature of the ICF. The decision to initiate T-DXd must be made independently by treating physicians as part of routine clinical practice.
  • Patients are willing to sign the written ICF, indicating that they understand the purpose of the study and procedures required for participation.

Exclusion Criteria:

  • -Patients with a history of other malignancies, other than basal cell carcinoma of the skin and squamous cell carcinoma of the skin.
  • Patients who received prior chemotherapy in the metastatic setting.
  • Patients with Eastern Cooperative Oncology Group (ECOG) status ≥2 or missing ECOG status at the time of initiation of T-DXd (index date).
  • Patients with a history of participation in another clinical trial in the metastatic setting.
  • Female patient with current or planned pregnancy, or breastfeeding.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
real-world progression-free survival
Time Frame: 18 months
To describe the real-world progression-free survival (rwPFS) of T-DXd in patients with HR-positive, HER2-low or HER2-ultralow mBC who initiated T-DXd after progression on ET in the GCC countries
18 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
safety profile
Time Frame: 18 months
To assess the safety profile (in terms of incidence and severity of adverse events [AEs], particularly treatment-emergent AEs (TEAEs) and those of special interest) and reasons for treatment discontinuation during the period with active treatment on T-DXd in the GCC countries.
18 months
baseline patient characteristics
Time Frame: 18 months
To assess the baseline patient characteristics and clinical presentation of patients with HR-positive, HER2-low or HER2-ultralow mBC who initiated T-DXd after progression on ET in the GCC countries.
18 months
T-DXd treatment patterns
Time Frame: 18 months
To describe the T-DXd treatment patterns and the lines of ET prior to T-DXd in patients with HR-positive, HER2-low or HER2-ultralow mBC in the GCC countries.
18 months
real-world time to next treatment (TTNT)
Time Frame: 18 months
To describe the real-world time to next treatment (TTNT) of T-DXd in patients with HR-positive, HER2-low or HER2-ultralow mBC who initiated T-DXd after progression on ET in the GCC countries
18 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
AstraZeneca

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 30, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 30, 2029

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 30, 2029

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 13, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 13, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 20, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 20, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 13, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • D7814R00001

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal Vivli.org. All requests will be evaluated as per the AZ disclosure commitment:

https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure. Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

IPD Sharing Time Frame

AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA PhRMA Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure

IPD Sharing Access Criteria

When a request has been approved AstraZeneca will provide access to the anonymized individual patient-level data via secure research environment Vivli.org.

Signed Data Usage Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information

IPD Sharing Supporting Information Type

  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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