Follows patients with HER2-low breast cancer treated with trastuzumab deruxtecan
Observes adults with advanced HER2-low breast cancer receiving trastuzumab deruxtecan, a targeted drug.
Plain-language title generated from the registry record
Registry title: DESTINY Breast Respond HER2-(Ultra)Low Europe
Key facts
- Where
- Graz, Innsbruck, Klagenfurt, Leoben, Linz, Rankweil, Salzburg, Vienna, Vöcklabruck, Wels, and Wiener Neustadt, AustriaSee the 14 sites
Where in Austria
- Medizinische Universität GrazGraz, AustriaNo longer taking part
- Medizinische Universität InnsbruckInnsbruck, AustriaTaking people
- Klinikum Klagenfurt am WortherseeKlagenfurt, AustriaTaking people
- LKH Hochsteiermark-LeobenLeoben, AustriaNo longer taking part
- Ordensklinikum Linz GmbH - Barmherzige SchwesternLinz, AustriaTaking people
- Interne II, LKH FeldkirchRankweil, AustriaNo longer taking part
- KH der Barmherzigen Brüder SalzburgSalzburg, AustriaTaking people
- Uniklinikum SalzburgSalzburg, AustriaTaking people
- Krankenhaus HietzingVienna, AustriaTaking people
- Medical University of ViennaVienna, AustriaTaking people
- Medizinische Universität WienVienna, AustriaNo longer taking part
- Salzkammergut-Klinikum VöcklabruckVöcklabruck, AustriaTaking people
- Klinikum Wels-Grieskirchen GmbHWels, AustriaNo longer taking part
- Landesklinikum Wiener NeustadtWiener Neustadt, AustriaTaking 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?
Trial details
- Who runs it
- Daiichi Sankyo Europe, GmbH, a Daiichi Sankyo Company
- Trial code
- NCT05945732
- Record updated
- 19 August 2026
- Original description
Trastuzumab deruxtecan (T-DXd) as monotherapy is indicated for the treatment of adult patients with unresectable or metastatic HER2-low breast cancer who have received prior chemotherapy in the metastatic setting or developed disease recurrence during or within 6 months of completing adjuvant chemotherapy.Read full original descriptionShow less
A Prospective, Non-interventional Study (NIS) With Trastuzumab Deruxtecan For Patients With HER2-(Ultra)Low Expressing Unresectable and/or Metastatic Breast Cancer Accompanied By a Disease Registry of Patients Treated With Conventional Chemotherapy (DESTINY Breast Respond HER2-(Ultra)Low Europe)
Trastuzumab deruxtecan (T-DXd) as monotherapy is indicated for the treatment of adult patients with unresectable or metastatic HER2-low breast cancer who have received prior chemotherapy in the metastatic setting or developed disease recurrence during or within 6 months of completing adjuvant chemotherapy.
Based on the extended therapeutic indication of Trastuzumab deruxtecan (Enhertu®), a new patient population will be enrolled, comprising adult patients with unresectable or metastatic HR-positive, HER2-low, or HER2-(ultra)low breast cancer who have received at least one endocrine therapy in the metastatic setting and are not considered suitable for endocrine therapy as the next line of treatment.
Inclusion: Study Group 1 and Study Group 2; Adult patient (age ≥ 18 years) with histological or cytological confirmed diagnosis of unresectable and/or mBC; Decision to newly initiate therapy of T-DXd or conventional chemotherapy according to the physicians choice per SmPC; Written and signed Informed Consent to participate in the study; Study Group 1; Documented HER2-low status (IHC1+, IHC2+/ISH-); Patients who have received prior chemotherapy in the metastatic setting or; Patients who have developed disease recurrence during or within 6 months of completing adjuvant chemotherapy; Study Group 2:; Documented HR+ status; Documented HER2-low status (IHC1+ or IHC2+/ISH-) or HER2-ultralow (defined as IHC 0 with membrane staining [IHC > 0 to <1+]) status; Patients who have received at least one endocrine therapy in the metastatic setting; Patients who have NOT received prior chemotherapy in the metastatic setting.
Exclusion: Study Group 1 and Study Group 2; Pregnancy or breastfeeding; Patients who at time of data collection for this study are participating in or have participated in an interventional study that remains blinded; No other specific exclusion criteria are defined, as patients will be treated according to the proposed indication statements in the SmPC.