CI

At a glance

ClinicalIndex Comparison Record
Phase 3Active· 1,600 target
Drug / intervention
DS-8201a +1 moredrug
Likely dose
DS-8201a 5.4 mg/kgfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04622319
NCT04622319Phase 3ActiveUpdate OverdueCompletion was 11mo ago
Enrollment Stalled

A Phase 3, Multicenter, Randomized, Open-Label, Active-Controlled Study of Trastuzumab Deruxtecan (T-DXd) Versus Trastuzumab Emtansine (T-DM1) in Participants With High-Risk HER2-Positive Primary Breast Cancer Who Have Residual Invasive Disease in Breast or Axillary Lymph Nodes Following Neoadjuvant Therapy (DESTINY-Breast05)

Daiichi Sankyo·interventional·Posted Nov 9, 2020·Updated May 15, 2026

In Brief

A Phase 3 clinical trial evaluating DS-8201a and T-DM1 for HER2-Positive Primary Breast Cancer and Residual Invasive Breast Cancer. Active but no longer recruiting, targeting 1,600 participants across 482 sites in 31 countries.

Signals

Enrollment appears stalled

Detailed Summary

Patients with HER2-positive primary breast cancer (BC) who do not achieve complete response after appropriate neoadjuvant therapy are at higher risk of disease recurrence. More effective treatment options are needed for this patient population. This study will examine the efficacy and safety of trastuzumab deruxtecan (T-DXd) compared with trastuzumab emtansine (T-DM1) in high-risk patients with residual invasive breast cancer following neoadjuvant therapy.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesArgentina, Australia, Belgium, Brazil, Canada, Chile, China, Czechia, Denmark, France, Germany, Greece, Hong Kong, Ireland, Israel, Italy, Japan, Mexico, Netherlands, Peru, Poland, Portugal, Romania, Russia, Singapore, South Korea, Spain, Taiwan, Turkey (Türkiye), United Kingdom, United States

Timeline

Phase 3Active
20212022202320242025202620272028
First PostedNov 9, 2020
Enrollment StartDec 4, 2020
Primary CompletionJul 2, 2025
Study CompletionJun 20, 2028
TodayJul 2, 2026
Enrollment to primary: 4.6 yearsPosted 5.6 years ago

Interventions

DS-8201adrug

Administered initially as an intravenous (IV) infusion at a dose of 5.4 mg/kg on Day 1 of each 21-day cycle

T-DM1drug

Administered initially as an intravenous (IV) infusion at a dose of 3.6 mg/kg on Day 1 of each 21-day cycle