Real-world use of trastuzumab deruxtecan in metastatic breast cancer after endocrine therapy
Observes how trastuzumab deruxtecan is used in adults with metastatic breast cancer.
Plain-language title generated from the registry record
Registry title: 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
Key facts
- Where
- Jeddah, Mecca, and Riyadh, Saudi ArabiaSee the 3 sites
AI summary: who the study is looking for
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for women with HR-positive breast cancer that has spread, with HER2-low or HER2-ultralow status, who have started trastuzumab deruxtecan (T-DXd) in routine care after earlier hormone treatment.
- Age
- 18 years or older when T-DXd was started.
- Sex
- Women only.
- Disease stage
- Metastatic (spread) breast cancer that is HR-positive and HER2-low (IHC 1+ or 2+ without ISH gene amplification) or HER2-ultralow (IHC 0 with membrane staining).
- Earlier treatment
- At least one earlier line of endocrine therapy (with or without targeted therapy) for metastatic disease. No chemotherapy for metastatic disease. T-DXd started up to 30 days before signing the consent form, decided by the treating doctor as part of routine care.
- Biomarker or test result
- HR-positive. HER2-low or HER2-ultralow on the closest local HER2 test.
Main reasons for not taking part
- History of another cancer, other than basal cell or squamous cell skin cancer
- Earlier chemotherapy for metastatic disease
- ECOG status 2 or higher, or ECOG status missing at T-DXd start
- Took part in another clinical trial in the metastatic setting
- Current or planned pregnancy, or breastfeeding
Read by machine on 12 November 2026.
Where in Saudi Arabia
- JeddahHospital not named in the registryNot yet recruiting
- Mecca, Mecca RegionHospital not named in the registryNot yet recruiting
- RiyadhHospital not named in the registryTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- AstraZeneca
- Trial code
- NCT07597993
- Record updated
- 23 September 2026
- Original description
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.Read full original descriptionShow less
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.
Inclusion: -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: Patients who received prior chemotherapy in the metastatic setting; -Patients with a history of other malignancies, other than basal cell carcinoma of the skin and squamous cell carcinoma of the skin; Patients with a history of participation in another clinical trial 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); Female patient with current or planned pregnancy, or breastfeeding.