● LIVE #ESMO26 live from Madrid, Oct 23–27 — today’s highlights, trending trials and physician reactions Follow ESMO 2026 live →
KOL Pulse — Trial Profile

DESTINY-Breast 05 Trial

DESTINY-Breast05 is a Phase 3 trial of adjuvant trastuzumab deruxtecan (T-DXd, Enhertu) versus T-DM1 in high-risk HER2-positive early breast cancer with residual invasive disease after neoadjuvant therapy. T-DXd reduced the risk of invasive recurrence or death by 53% (iDFS HR 0.47; p<0.0001), with 3-year iDFS 92.4% versus 83.7%, supporting FDA approval on May 15, 2026. Sponsor: AstraZeneca / Daiichi Sankyo.

HER2+ Early Breast Cancer · Residual Disease Trastuzumab Deruxtecan (Enhertu) SABCS 2025 · NEJM 2026 · NCT04622319 ✓ FDA APPROVED MAY 15 2026
Discover KOL Sentiment on DESTINY-Breast 05 →

Physician reactions to DESTINY-Breast05

Posts by physicians about DESTINY-Breast05, newest first: ESMO 2026 week (October 17–24, 2026), then earlier posts from the ESMO 2025 presentation, SABCS 2025 and January 2026. Each post is shown in full and verbatim and linked to the original on X.

Paolo Tarantino
Paolo Tarantino@PTarantinoMD
𝕏

PROs from DB05 presented by Carlos Barrios. Preserved QoL with T-DXd (vs T-DM1), with improvement in key domains (pain, arm symptoms) and worsening in social functioning. Overall, they confirm the role of adjuvant T-DXd for patients with high-risk RD. #ESMO26 #ESMOAmbassadors https://t.co/2zoMFUxKh7

1.1K views 7 likes2 RT 2026-10-23
Aya Mohamed | MSc, MD 🎗
Aya Mohamed | MSc, MD 🎗@Dr_Oncologista
𝕏

DESTINY-Breast05: PROs at #ESMO26 HRQoL was largely maintained with both T-DXd and T-DM1 in high-risk HER2+ early breast cancer with residual invasive disease. @OncoAlert #BCSM #BreastCancer https://t.co/3rroj3ppmI

761 views 28 likes7 RT 2026-10-23
Sara Tolaney
Sara Tolaney@stolaney1
𝕏

DESTINY-Breast05: TDXd for residual HER2+ dz HRQOL maintained with both TDXd + T-DM1 TDXd assoc w/ longer time to deterioration in pain and arm symptoms c/w T-DM1 @OncoAlert #ESMO26 https://t.co/ffHDPkWvh6

654 views 8 likes6 RT 2026-10-23
Gaia Griguolo
Gaia Griguolo@GaiaGriguolo
𝕏

Great discussion of DestinyBreast05 quality of life data! Similar overall HRQoL, but better pain symptoms (are these relapses?) and worse social functioning with TDXd Preserved QoL does not mean absence of toxicity @OncoAlert #ESMO26 https://t.co/TqjnDWQy67

299 views 5 likes5 RT 2026-10-23
Elisabetta Bonzano MD, PhD
Elisabetta Bonzano MD, PhD@to_be_elizabeth
𝕏

📌 Rapid Oral Breast Cancer, Early stage ✨Patient-reported outcomes from DESTINY-Breast05: HRQoL with T-DXd versus T-DM1 in patients with high-risk HER2-positive eBC #ESMO26 🇪🇸 @OncoAlert #OncoAlertAF https://t.co/8YCn03ukj9

267 views 6 likes6 RT 2026-10-23
Abi Siva MD
Abi Siva MD @AbiSivaMD
Noticed in the latest @NCCN update: post-neoadjuvant T-DXd made the list, but neoadjuvant T-DXd + THP didn’t. Curious whether this signals preference for DB-05 vs DB-11, or simply where the evidence is easiest to implement. @PTarantinoMD @JAMouabbi @drsarahsam @OncBrothers https://t.co/VpHLzhDynQ
👁 7.3K ❤ 26 🔁 8 2026-01-21
NEJM
NEJM @NEJM
Original Article: Trastuzumab Deruxtecan in Residual HER2-Positive Early Breast Cancer (DESTINY-Breast05 phase 3 trial) https://t.co/bSyzhAR3U8 #SABCS25 | @SABCSSanAntonio https://t.co/NxQimnFjIY
👁 11K ❤ 30 🔁 3 2025-12-11
Yakup Ergün
Yakup Ergn @dr_yakupergun
#SABCS25 DESTINY-Breast05: Post-neoadjuvant high-risk HER2+ EBC 🔹️iDFS HR 0.47, 3-yr iDFS 92.4% vs 83.7% 🔹️Major reduction in distant relapse (HR 0.49) and early signal of lower CNS events 🔹️Benefit consistent across HR status, nodal burden, operability, and HER2 strata https://t.co/hu2vZNAmmH
👁 3.1K ❤ 34 🔁 12 2025-12-11
Hope Rugo
Hope Rugo @hoperugo
#SABCS2025 @curijoey and Sybille Loibl present safety data from DB11 and DB05. Most encouraging is the lack of an increase in ILD/pneumonitis when TDXd is given through adjuvant RT. Very careful monitoring and management will be critical in this setting @OncoAlert https://t.co/0abaLOviJc
👁 5.7K ❤ 34 🔁 18 2025-12-10
Stephanie Graff, MD, FACP, FASCO
Stephanie Graff, MD, FACP, FASCO @DrSGraff
How are we feeling on Sunday morning RE: Destiny Breast 11 (neoadj) and DB-05 (residual disease)? What are we doing in the overlapping population? (Don’t vote just to see; that’s what the bookmark tab is for!) #ESMO25
👁 6.4K ❤ 16 🔁 9 2025-10-19
Santhosh Ambika
Santhosh Ambika @RenoHemonc
@dr_yakupergun @SuyogCancer @AnisToumeh @drsarahsam @stolaney1 @OncBrothers @oncologician @PTarantinoMD @JAMouabbi @DrSGraff Go with Tolaney approach to spare unnecessary Rx. https://t.co/C4lvMqBK0t
👁 12.5K ❤ 33 🔁 19 2025-10-18
Paolo Tarantino
Paolo Tarantino @PTarantinoMD
The KM curve of 2025: among high risk patients with HER2+ eBC and RD, adjuvant T-DXd halved the risk of recurrence vs T-DM1. New SoC for pts with: -inoperable disease at diagnosis -node-positive RD 10.8% rate of ILD, 3 deaths. Remember to monitor the lungs! #ESMOAmbassadors https://t.co/XURyOLXW3q
👁 5K ❤ 62 🔁 22 2025-10-18
Sherene Loi, MD
Sherene Loi, MD @LoiSher
DB05 #esmo25 impressive efficacy for post op node + or inoperable at baseline -balanced with ~10%ILD but 👏less CNS 🧠recurrences 🙌 Bravo to those &gt;70% patients putting up with all that nausea!! @myESMO #esmoambassadors @OncoAlert https://t.co/ZGRNomzMJs
👁 3.9K ❤ 37 🔁 11 2025-10-18
Yüksel Ürün
Yksel rn @DrYukselUrun
Excellent discussion as always by @stolaney1 shedding new light on HER2+ treatment direction.@myESMO #ESMO25 https://t.co/qtBJlrDAne
👁 3.8K ❤ 18 🔁 3 2025-10-18

DESTINY-Breast05 Key Takeaways

Invasive Disease-Free Survival (iDFS) — Primary Endpoint

Median iDFS was NOT REACHED in both arms at interim analysis. T-DXd reduced the risk of invasive disease recurrence or death by 53% — HR 0.47 (95% CI 0.34–0.66; P<0.0001). The 3-year iDFS rate was 92.4% (T-DXd) vs. 83.7% (T-DM1). Distant disease recurrence risk fell 51% and brain metastasis risk fell 36% with T-DXd.

✓ iDFS HR 0.47 — 53% reduction in invasive recurrence/death

📄 Source: NEJM 2026 (Loibl et al.) — DCO Sept 2025 →

Overall Survival (OS) — Key Secondary

OS data was immature at the interim analysis (2.9% data maturity). OS hazard ratio was 0.61 (95% CI 0.34–1.10), 3-year OS 97.4% (T-DXd) vs. 95.7% (T-DM1). Final OS analysis pending.

OS HR 0.61 — immature (2.9% maturity)

📄 Source: NEJM 2026 (Loibl et al.) →

Safety & Tolerability

Grade ≥3 AEs: 50.6% (T-DXd) vs. 51.9% (T-DM1). Key T-DXd AEs: nausea 71.3%, decreased neutrophil count 31.6%. Adjudicated drug-related ILD/pneumonitis occurred in 9.6% with T-DXd (Grade 1 2.0%, Grade 2 6.5%, Grade 3 0.9%, Grade 5 0.2% — 2 fatal events) vs. 1.6% with T-DM1. (interim)

⚠ ILD 9.6% (T-DXd) — strict monitoring required

📄 Source: NEJM 2026 (Loibl et al.) →

Regulatory status & clinical implications — FDA approved May 15, 2026 via Project Orbis; dosing 5.4 mg/kg IV Q3W x14 cycles; boxed warning ILD & embryo-fetal toxicity. (FDA.gov) ✅ FDA-approved: DESTINY-Breast 05 adds T-DXd (Enhertu) as a new adjuvant option for adult patients with HER2-positive (IHC 3+ or ISH+) early breast cancer with residual invasive disease following neoadjuvant trastuzumab (±pertuzumab) plus taxane therapy. T-DM1 (Kadcyla) retains its existing KATHERINE-based indication on label; T-DXd does not formally replace it, but did demonstrate head-to-head superiority on iDFS in DB-05 and is positioned by investigators as a potential new standard of care. ✅ Companion approval: Via DESTINY-Breast 11 (same May 15, 2026 FDA action under Project Orbis), T-DXd → THP is also approved in the neoadjuvant setting for Stage II/III HER2+ disease. Together the two indications extend T-DXd across the HER2+ curative-intent continuum. Investigators including Shanu Modi (MSK) describe T-DXd as a potential new standard of care in early-stage disease given its head-to-head superiority over T-DM1.

Sponsor / Drug — AstraZeneca / Daiichi Sankyo; T-DXd (Enhertu), a HER2-directed antibody-drug conjugate. (FDA label)

Compiled and reviewed by the KOL Pulse research team, led by Brian Shields, Founder, KOL Pulse. Last updated October 24, 2026.

Top KOL Voices on DESTINY-Breast 05

Santhosh Ambika
Santhosh Ambika
@RenoHemonc
12.5K impressions
Stephanie Graff, MD, FACP, FASCO
Stephanie Graff, MD, FACP, FASCO
@DrSGraff
9.2K impressions
Abi Siva MD
Abi Siva MD
@AbiSivaMD
7.3K impressions
Paolo Tarantino
Paolo Tarantino
@PTarantinoMD
6.4K impressions
Hope Rugo
Hope Rugo
@hoperugo
5.7K impressions
Oncology Brothers
Oncology Brothers
@OncBrothers
4.2K impressions

SABCS 2025 / ESMO 2025 / NEJM 2026 Slides & Data

ESMO 2026 slides

Slides from ESMO 2026 (Madrid) as photographed and shared on X by physicians, newest first. Each post is shown verbatim; click any slide to enlarge, and open the OCR text under each post. All ESMO 2026 DESTINY-Breast05 slides in the KOL Pulse slide library →

Gaia Griguolo (@GaiaGriguolo)
Gaia Griguolo @GaiaGriguolo
DESTINY-Breast05 · ESMO 2026 slides
Oct 23, 2026 · ESMO 2026
View on X ↗
Great discussion of DestinyBreast05 quality of life data! Similar overall HRQoL, but better pain symptoms (are these relapses?) and worse social functioning with TDXd Preserved QoL does not mean absence of toxicity @OncoAlert #ESMO26 https://t.co/TqjnDWQy67
Aya Mohamed | MSc, MD 🎗 (@Dr_Oncologista)
Aya Mohamed | MSc, MD 🎗 @Dr_Oncologista
DESTINY-Breast05 · ESMO 2026 slides
Oct 23, 2026 · ESMO 2026
View on X ↗
DESTINY-Breast05: PROs at #ESMO26 HRQoL was largely maintained with both T-DXd and T-DM1 in high-risk HER2+ early breast cancer with residual invasive disease. @OncoAlert #BCSM #BreastCancer https://t.co/3rroj3ppmI
[Slide 1] 16:15 - 17:45 Rapid oral: Breast cancer, early stage CHAIRS: MARIA VITTORIA DIECI, SANDRA XIMENA FRANCO MILLAN, LILIT HARUTYUNYAN DESTINY-Breast05 Study Design and Interim Results A global, multicenter, randomized, open-label phase 3 trial (NCT04622319) Population • Residual invasive disease in the breast and/or axillary lymph nodes after neoadjuvant chemotherapy with HER2-directed therapy (NAT)(a) • High risk of recurrence(b) • Centrally confirmed HER2+ (IHC 3+ and/or ISH+) eBC • ECOG PS 0 or 1 N = 1635 R 1:1 T-DXd 5.4 mg/kg IV Q3W for 14 cycles N = 818 T-DM1 3.6 mg/kg IV Q3W for 14 cycles N = 817 40-day safety follow-up Primary endpoint • IDFS by INV Key secondary endpoint • DFS by INV Other secondary endpoints • OS, DRFI by INV, BMFI by INV, safety Exploratory endpoints • HRQoL/PRO Interim Efficacy and Safety Results (DCO: July 02, 2025)(1,2,c) Post-neoadjuvant T-DXd demonstrated superior efficacy with no new safety signals in patients with high-risk HER2+ eBC and residual invasive disease after NAT,(1,2) and is now FDA approved(3) • IDFS events (T-DXd, 51 [6.2%] vs T-DM1, 102 [12.5%]) hazard ratio, 0.47 [95% CI, 0.34-0.66]; P <0.001) • 53% reduction in the risk of invasive disease recurrence or death • Estimated 3-year IDFS rates were 92.4% for T-DXd and 83.7% for T-DM1 The overall safety profile of T-DXd showed no new safety signals • In both treatment arms, >72% of patients had completed 14 treatment cycles(c); treatment had concluded for all patients in the study at DCO • Adjudicated drug-related ILD cases were mostly low grade and reversible with treatment management guidelines We report exploratory PRO results at interim analysis (DCO: July 02, 2025) BMFI, brain metastasis-free interval; CI, confidence interval; DCO, data cutoff; DFS, disease free-survival; DRFI, distant recurrence-free interval; eBC, early breast cancer; ECOG PS, Eastern Cooperative Oncology Group performance status; HER2, human epidermal growth factor receptor 2; HRQoL, health-related quality of life; IDFS, invasive disease-free survival; IHC, immunohistochemistry; ILD, interstitial lung disease; INV, investigator; ISH, in situ hybridization; IV, intravenous; NAT, neoadjuvant therapy; OS, overall survival; PRO, patient-reported outcome; Q3W, every 3 weeks; R, randomization; T-DM1, trastuzumab emtansine; T-DXd, trastuzumab deruxtecan. (a)NAT is defined as ≥16 weeks NAT with ≥9 weeks of trastuzumab ± pertuzumab and ≥9 weeks of taxane-based chemotherapy. (b)High-risk defined as Inoperable (cT4, N0-3, M0 or cT1-3, N2-3, M0) before NAT or Operable (cT1-3, N0-1, M0) before NAT with axillary node-positive disease (ypN1-3) after NAT. (c)Median study treatment duration: T-DXd, 9.8 months; T-DM1, 9.7 months. 1. Loibl S et al. N Engl J Med. 2026;394(9):845-857. 2. Geyer CE Jr et al. Presented at: ESMO Annual Congress; October 17-21, 2025; Berlin, Germany. 3. FDA approves two separate indications for fam-trastuzumab deruxtecan-nxki in HER2-positive early-stage breast cancer. Press release. May 15, 2026. Accessed July 10, 2026. Dr. Carlos Barrios [Slide 3] Overall HRQoL Was Preserved From Baseline With Both T-DXd and T-DM1 (EORTC QLQ-C30(a)) [three line charts: Mean (SD) CFB by cycle C2, C6, C10, C14; Better/Worse; ± 10-point change is considered clinically meaningful] GHS/QoL Physical Functioning Emotional Functioning Patients with CFB data,(c) n | C2 | C6 | C10 | C14 T-DXd (n = 818) | 715 | 591 | 545 | 456 T-DM1 (n = 817) | 701 | 619 | 562 | 480 (same patient counts shown under each of the three panels) Legend: T-DXd (solid) / T-DM1 (dashed) Mean change from baseline remained stable (within ± 10 points) over time across GHS/QoL, physical functioning, and emotional functioning in both treatment groups, supporting preservation of HRQoL during treatment C, cycle; CFB, change from baseline; EORTC QLQ-BR23, European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Breast Cancer Module 23; EORTC QLQ-C30, European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30; EQ-5D-5L, EuroQol 5-Dimension 5-Level questionnaire; GHS, global health status; PRO, patient-reported outcome; QoL, quality of life; T-DM1, trastuzumab emtansine; T-DXd, trastuzumab deruxtecan; VAS, visual analog scale. (a)Higher scores in the EORTC QLQ-C30 GHS/QoL and functioning scales correspond to a higher/healthier level of functioning or QoL. (b)Day 1 of each cycle. (c)PRO data collected after new anti-cancer therapy, completion of 14 treatment cycles, or discontinuation of study drug are excluded. Dr. Carlos Barrios
Elisabetta Bonzano MD, PhD (@to_be_elizabeth)
Elisabetta Bonzano MD, PhD @to_be_elizabeth
DESTINY-Breast05 · ESMO 2026 slides
Oct 23, 2026 · ESMO 2026
View on X ↗
📌 Rapid Oral Breast Cancer, Early stage ✨Patient-reported outcomes from DESTINY-Breast05: HRQoL with T-DXd versus T-DM1 in patients with high-risk HER2-positive eBC #ESMO26 🇪🇸 @OncoAlert #OncoAlertAF https://t.co/8YCn03ukj9
[Slide 1] 16:15 - 17:45 Rapid oral: Breast cancer, early stage CHAIRS: MARIA VITTORIA DIECI, SANDRA XIMENA FRANCO MILLAN, LILIT HARUTYUNYAN Exploratory PRO Assessments Questionnaire | Description | Scales | Analyses EORTC QLQ-C30 | Oncology-specific questionnaire | • Global health status (GHS)/QoL • Functioning scales: physical, emotional, cognitive, and social • Symptom scales: pain, fatigue, nausea/vomiting • Single-item scales: dyspnea, sleep disturbance, appetite loss, constipation, diarrhea, and financial impact | • Change from baseline • Time to definitive deterioration (clinically meaningful definitive deterioration during the study period, defined as a change of ≥10 points from baseline at either 2 or more consecutive time points, last PRO assessment, or death by the first survival follow-up visit) EORTC QLQ-BR23 | Breast cancer–specific questionnaire | • Subscales: breast symptoms, arm symptoms, body image, sexual functioning, and systemic therapy side effects | • Change from baseline • Time to definitive deterioration EQ-5D-5L | Generic questionnaire | • Self-rated health status (VAS) | • Time to definitive deterioration PRO endpoints are reported for the following study time points(a): Cycle 1 (baseline) | Cycle 2 | Every 4 cycles (cycle 6, 10, 14) | End of treatment Completion(b) was comparable throughout treatment in both treatment groups, supporting interpretability of the longitudinal PRO analyses EORTC QLQ-BR23, European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Breast Cancer Module 23; EORTC QLQ-C30, European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30; EQ-5D-5L, EuroQol 5-Dimension 5-Level questionnaire; GHS, global health status; HR, hormone receptor; HRQoL, health-related quality of life; PRO, patient-reported outcome; QoL, quality of life; TDD, time to definitive deterioration; VAS, visual analog scale. (a)PRO assessments began before infusion on day 1 of cycle 1; 1 cycle = 21 days. (b)The number of patients who completed at least one question from a questionnaire divided by the number of patients randomized within each treatment arm. Dr. Carlos Barrios Speaker panel: Carlos Barrios — Patient-reported outcomes (PROs) from DESTINY-Breast05: Health-related quality of life (HRQoL) with trastuzumab Deruxtecan (T-DXd) versus trastuzumab emtansine (T-DM1) in patients (Pts) with high-risk HER2-positive early breast cancer (eBC) ALICANTE AUDITORIUM - HALL 6
Paolo Tarantino (@PTarantinoMD)
Paolo Tarantino @PTarantinoMD
DESTINY-Breast05 · ESMO 2026 slides
Oct 23, 2026 · ESMO 2026
View on X ↗
PROs from DB05 presented by Carlos Barrios. Preserved QoL with T-DXd (vs T-DM1), with improvement in key domains (pain, arm symptoms) and worsening in social functioning. Overall, they confirm the role of adjuvant T-DXd for patients with high-risk RD. #ESMO26 #ESMOAmbassadors https://t.co/2zoMFUxKh7
[Slide 1] [Photo of auditorium screen; speaker inset] Overall HRQoL Outcomes Were Comparable, With Domain-Specific Differences Between T-DXd and T-DM1 TDD,a median (95% CI), months: T-DXd (n = 818) | T-DM1 (n = 817) | Hazard Ratio (95% CI) EORTC QLQ-C30 GHS/QoL: 24.02 (22.64-NE) | 23.66 (22.64-25.26) | 1.15 (0.98-1.34) Pain symptoms: 24.11 (23.75-31.70) | 22.74 (18.07-24.48) | 0.77 (0.65-0.90) Physical functioning: 30.09 (30.09-NE) | 33.91 (NE-NE) | 1.17 (0.95-1.43) Emotional functioning: 26.25 (24.02-NE) | 27.93 (27.93-NE) | 1.02 (0.85-1.22) Social functioning: 24.15 (23.66-NE) | NE (26.58-NE) | 1.29 (1.08-1.54) EORTC QLQ-BR23 Arm symptoms: 23.13 (18.04-24.15) | 17.54 (12.22-21.98) | 0.82 (0.70-0.95) Breast symptoms: NE (26.48-NE) | NE (27.20-NE) | 0.83 (0.66-1.03) EQ-5D-5L VAS: 24.15 (23.36-29.80) | 23.85 (23.36-26.58) | 1.05 (0.89-1.24) [Forest plot axis 0.4-1.8; Favors T-DXd / Favors T-DM1] - There was no difference observed in TDD between T-DXd and T-DM1 across overall HRQoL, physical functioning, emotional functioning, breast symptoms, and EQ-5D-5L VAS - T-DXd was associated with a longer time to deterioration in pain and arm symptoms compared with T-DM1, while T-DM1 was associated with a longer time to deterioration in social function compared with T-DXd during the study period [Abbreviation footnotes - fine print, partly illegible] Dr. Carlos Barrios
Sara Tolaney (@stolaney1)
Sara Tolaney @stolaney1
DESTINY-Breast05 · ESMO 2026 slides
Oct 23, 2026 · ESMO 2026
View on X ↗
DESTINY-Breast05: TDXd for residual HER2+ dz HRQOL maintained with both TDXd + T-DM1 TDXd assoc w/ longer time to deterioration in pain and arm symptoms c/w T-DM1 @OncoAlert #ESMO26 https://t.co/ffHDPkWvh6
[Slide 1] Conclusions - Overall, key HRQoL domains were maintained with both T-DXd and T-DM1 in patients with high-risk HER2-positive eBC who had residual invasive disease after neoadjuvant therapy - PRO assessments were comparable between treatments, with some differences in selected domains: o T-DXd was associated with a longer time to deterioration in pain and arm symptoms compared with T-DM1 during the study period o T-DM1 was associated with a longer time to deterioration in social function compared with T-DXd during the study period DESTINY-Breast05 HRQoL findings demonstrate preservation of patient-reported quality of life and, together with previously reported efficacy data, support T-DXd as a new standard of care in the post-neoadjuvant setting eBC, early breast cancer; HER2, human epidermal growth factor receptor 2; HRQoL, health-related quality of life; PRO, patient-reported outcome; T-DM1, trastuzumab emtansine; T-DXd, trastuzumab deruxtecan. Dr. Carlos Barrios [Slide 2] Overall HRQoL Outcomes Were Comparable, With Domain-Specific Differences Between T-DXd and T-DM1 TDD,a median (95% CI), months: T-DXd (n = 818) | T-DM1 (n = 817) | Hazard Ratio (95% CI) EORTC QLQ-C30 GHS/QoL: 24.02 (22.64-NE) | 23.66 (22.64-25.26) | 1.15 (0.98-1.34) Pain symptoms: 24.11 (23.75-31.70) | 22.74 (18.07-24.48) | 0.77 (0.65-0.90) Physical functioning: 30.09 (30.09-NE) | 33.91 (NE-NE) | 1.17 (0.95-1.43) Emotional functioning: 26.25 (24.02-NE) | 27.93 (27.93-NE) | 1.02 (0.85-1.22) Social functioning: 24.15 (23.66-NE) | NE (26.58-NE) | 1.29 (1.08-1.54) EORTC QLQ-BR23 Arm symptoms: 23.13 (18.04-24.15) | 17.54 (12.22-21.98) | 0.82 (0.70-0.95) Breast symptoms: NE (26.48-NE) | NE (27.20-NE) | 0.83 (0.66-1.03) EQ-5D-5L VAS: 24.15 (23.36-29.80) | 23.85 (23.36-26.58) | 1.05 (0.89-1.24) [Forest plot axis 0.4-1.8; Favors T-DXd <- -> Favors T-DM1] - There was no difference observed in TDD between T-DXd and T-DM1 across overall HRQoL, physical functioning, emotional functioning, breast symptoms, and EQ-5D-5L VAS - T-DXd was associated with a longer time to deterioration in pain and arm symptoms compared with T-DM1, while T-DM1 was associated with a longer time to deterioration in social function compared with T-DXd during the study period CI, confidence interval; EORTC QLQ-BR23, European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Breast Cancer Module 23; EORTC QLQ-C30, European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30; GHS, global health status; HRQoL, health-related quality of life; QoL, quality of life; NE, not estimable; TDD, time to definitive deterioration; T-DM1, trastuzumab emtansine; T-DXd, trastuzumab deruxtecan; VAS, visual analog scale. TDD was analyzed using Kaplan-Meier methods and Cox proportional hazards models. aClinically meaningful definitive deterioration during the study period, defined as a change of >=10 points from baseline at either 2 or more consecutive time points, last PRO assessment, or death by the first survival follow-up visit. Dr. Carlos Barrios

More slides on this page

Conference slides shared by KOLs and presenters, with full OCR text available. All slides verified DESTINY-Breast 05 content.

NEJM
NEJM @NEJM
SABCS 2025 / NEJM 2026 — DESTINY-Breast 05
17.7K impressions · 44 likes
View on X →
[Slide 1] Invasive Disease-free Survival 100 90 3-Yr Invasive 80 Patients Disease-free 100 with Survival 70 Percentage of Patients Event (95% CI) 60 95 T-DXd no. (%) percent 50 90 T-DXd 51 (6.2) 92.4 (89.7-94.4) 40 85 T-DM1 T-DM1 102 (12.5) 83.7 (80.2-86.7) 30 80 Hazard ratio for invasive disease or 20 death, 0.47 (95% CI, 0.34-0.66) 0 10 P<0.001 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 Months No. at Risk T-DXd 818 788 781 776 771 768 758 753 731 684 634 544 440 380 370 275 218 212 129 92 90 46 14 14 0 0 0 0 0 T-DM1 817 781 769 760 745 734 719 708 687 632 599 527 417 355 337 233 186 177 120 84 79 38 14 13 4 1 1 0 0
NEJM
NEJM @NEJM
SABCS 2025 / NEJM 2026 — DESTINY-Breast 05
11K impressions · 30 likes
View on X →
[Slide 1] A Invasive Disease-free Survival 100 90 3-Yr Invasive 80 Patients Disease-free 100 with Survival 70 Percentage of Patients Event (95% CI) 60 95 T-DXd no. (%) percent 50 90 T-DXd 51 (6.2) 92.4 (89.7-94.4) 40 85 T-DM1 T-DM1 102 (12.5) 83.7 (80.2-86.7) 30 80 Hazard ratio for invasive disease or 20 death, 0.47 (95% CI, 0.34-0.66) 0 10 P<0.001 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 Months No. at Risk T-DXd 818 788 781 776 771 768 758 753 731 684 634 544 440 380 370 275 218 212 129 92 90 46 14 14 0 0 0 0 0 T-DM1 817 781 769 760 745 734 719 708 687 632 599 527 417 355 337 233 186 177 120 84 79 38 14 13 4 1 1 0 0 B Disease-free Survival 100 90 3-Yr 80 Patients Disease-free 100 with Survival 70 Percentage of Patients Event (95% CI) 60 95 T-DXd no. (%) percent 50 90 T-DXd 52 (6.4) 92.3 (89.5-94.3) 40 85 T-DM1 T-DM1 103 (12.6) 83.5 (79.9-86.4) 30 80 Hazard ratio for invasive disease, 20 noninvasive disease, or death, 0 10 0.47 (95% CI, 0.34-0.66) 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 P<0.001 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 Months No. at Risk T-DXd 818 788 781 776 771 768 758 753 731 683 633 543 440 380 370 275 218 212 129 92 90 46 14 14 0 0 0 0 0 T-DM1 817 779 767 757 743 733 718 707 686 631 598 526 416 354 336 233 186 177 120 84 79 38 14 13 4 1 1 0 0 C Distant Recurrence-free Interval 100 90 Patients 80 Patients Event-free 100 70 with at 3 Yr Percentage of Patients 60 95 T-DXd Event (95% CI) 50 90 no. (%) percent T-DM1 T-DXd 40 42 (5.1) 93.9 (91.4-95.7) 85 T-DM1 81 (9.9) 86.1 (82.5-89.1) 30 80 20 Hazard ratio for distant recurrence, 0 0.49 (95% CI, 0.34-0.71) 10 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 Months No. at Risk T-DXd 818 786 778 774 770 767 757 753 731 684 635 545 442 382 372 276 219 213 129 92 90 46 14 14 0 0 0 0 0 T-DM1 817 780 769 761 746 739 724 713 694 639 606 533 424 362 345 240 192 182 121 84 79 38 14 13 4 1 1 0 0 --- [Slide 2] 3-Yr Invasive Disease-free Hazard Ratio for Invasive Disease Subgroup T-DXd T-DM1 Survival (95% CI) (95% CI) T-DXd T-DM1 no. of patients with event/total no. percent All patients 51/818 102/817 92.4 (89.7-94.4) 83.7 (80.2-86.7) 0.47 (0.34-0.66) Age <65 yr 46/735 87/736 92.1 (89.2-94.3) 84.1 (80.2-87.2) 0.50 (0.35-0.71) >65 yr 5/83 15/81 94.9 (87.0-98.1) 79.2 (67.9-87.0) 0.31 (0.11-0.86) Race Asian 19/399 34/386 95.1 (91.9-97.0) 89.5 (85.3-92.6) 0.53 (0.30-0.93) Non-Asian 32/419 68/431 89.5 (84.5-93.0) 77.9 (72.1-82.7) 0.44 (0.29-0.67) Geographic region Asia 19/392 33/380 95.0 (91.9-97.0) 89.7 (85.4-92.7) 0.55 (0.31-0.96) Europe 13/222 30/223 93.1 (86.9-96.4) 82.9 (75.8-88.1) 0.40 (0.21-0.77) North America and Australia 5/57 10/72 85.8 (63.9-94.9) 80.7 (65.3-89.7) 0.56 (0.19-1.63) Rest of the world 14/147 29/142 85.1 (73.6-91.8) 69.2 (56.3-79.0) 0.43 (0.23-0.81) Central HER2 status IHC 3+ 46/676 86/670 91.8 (88.7-94.1) 83.2 (79.2-86.5) 0.49 (0.34-0.70) ISH-positive 5/140 16/147 96.2 (91.0-98.4) 86.5 (78.1-91.8) 0.35 (0.13-0.97) Hormone-receptor status Positive 33/581 59/583 93.5 (90.6-95.6) 86.8 (82.9-89.9) 0.54 (0.35-0.82) Negative 18/237 43/234 89.4 (82.0-93.9) 75.6 (67.6-81.9) 0.37 (0.22-0.65) Operative status at disease presentation, before neoadjuvant therapy Operable disease 21/387 34/393 92.8 (88.0-95.7) 88.4 (83.8-91.8) 0.58 (0.34-1.01) Inoperable disease 30/431 68/424 92.0 (88.5-94.5) 79.4 (73.9-83.8) 0.41 (0.27-0.63) Pathological nodal status after neoadjuvant therapy Positive 40/660 87/658 92.5 (89.3-94.8) 82.5 (78.4-85.9) 0.43 (0.29-0.62) Negative 11/158 15/159 91.6 (85.3-95.3) 88.3 (80.6-93.0) 0.73 (0.33-1.59) HER2-targeted neoadjuvant therapy Single 13/176 27/171 87.5 (77.6-93.3) 77.9 (67.7-85.2) 0.43 (0.22-0.84) Dual 38/642 75/646 93.6 (90.9-95.5) 85.2 (81.4-88.2) 0.48 (0.33-0.71) Previous neoadjuvant therapy Anthracycline 32/423 61/399 90.6 (86.1-93.6) 80.3 (74.8-84.8) 0.45 (0.29-0.69) Platinum compound 20/386 37/392 93.9 (90.4-96.1) 87.3 (82.4-90.9) 0.54 (0.31-0.93) Radiotherapy treatment Sequential radiotherapy 15/326 34/279 93.8 (88.4-96.7) 83.2 (76.4-88.2) 0.35 (0.19-0.64) Concurrent radiotherapy 30/438 57/480 92.8 (89.7-95.0) 85.1 (80.6-88.6) 0.55 (0.35-0.85) No radiotherapy 6/54 11/58 81.0 (61.0-91.4) 73.4 (56.4-84.6) 0.57 (0.21-1.55) 0.06 0.12 0.25 0.50 1.00 2.00 T-DXd Better T-DM1 Better
Santhosh Ambika
Santhosh Ambika @RenoHemonc
SABCS 2025 / NEJM 2026 — DESTINY-Breast 05
12.5K impressions · 33 likes
View on X →
[Slide 1] 16:30 - 18:15 Presidential Symposium | CHAIRS: GIUSEPPE CURIGLIANO, BRIGETTE MA FUTURE STUDIES NEEDED HOW COULD WE INTEGRATE DB11 AND DB05? Can we use a response-guided approach? HP pCR X 14 cycles ctDNA cT≥3 or cN+ THP Breast MRI undetectable Surgery TDXd HER2+ BC x12 wks (at C2D1) response RD x14 cycles Any HR status Sara Tolaney Check ctDNA: If no response Baseline & Baseline breast MRI Cycle Day 1 HP Invited Discussant LBA1 for all patients ctDNA pCR T-DXd for 4 X 14 cycles Baseline tumor-informed detectable cycles Surgery ultrasensitive ctDNA for (at C2D1) RCB2/3 all patients RD ACx4-T-DM1x Plasma samples for serial ctDNA testing 14 cycles RCB1 " " T-DM1 X 14 cycles Baseline C2d1 (week 0) (week 3) Side adapted from Bia Sequi/Ada Waks BERLIN AUDITORIUM - HUB 27
Abi Siva MD
Abi Siva MD @AbiSivaMD
SABCS 2025 / NEJM 2026 — DESTINY-Breast 05
7.3K impressions · 26 likes
View on X →
[Slide 1] PREOPERATIVE/ADJUVANT THERAPY See BINV-M 1 of 10 for Considerations for Those Receiving Preoperative/Adjuvant Systemic Therapy. HR-Positive or -Negative and HER2-Positive9 Preferred: Preoperative or adjuvant setting: TCHP (Docetaxel/Carboplatin + Trastuzumab + Pertuzumab) Adjuvant setting: TCH (Docetaxel/Carboplatin + Trastuzumab) If no residual disease after preoperative therapy or no preoperative therapy: Complete up to 1 year of HER2-targeted therapy with Trastuzumabh (category 1) + Pertuzumab. If node positive at initial staging, Pertuzumab + Trastuzumab (category 1) If residual disease after preoperative therapy: Ado-trastuzumab emtansine (category 1) alone. If Ado-trastuzumab emtansine discontinued for toxicity, then Trastuzumab (category 1) + Pertuzumab to complete 1 year of therapy. If node positive at initial staging, Pertuzumab + Trastuzumab (category 1)J Fam-trastuzumab deruxtecan-nxki (category 1) for those with high risk of recurrence defined as inoperable cancer (cT4, N0-3, M0 or cT1-3, N2-3, M0) at presentation prior to neoadjuvant therapy or operable cancer (cT1-3, N0-1, M0) with axillary node-positive disease (ypN1-3) following preoperative therapy.
Paolo Tarantino
Paolo Tarantino @PTarantinoMD
SABCS 2025 / NEJM 2026 — DESTINY-Breast 05
5K impressions · 62 likes
View on X →
[Slide 1] Primary endpoint: IDFSᵃ T-DXd T-DM1 n= 818 n= 817 Patients with events, n (%) 51 (6.2) 102 (12.5) 3-year IDFS, % (95% CI) 92.4 (89.7-94.4) 83.7 (80.2-86.7) HR (95 % CI) 0.47 (0.34-0.66) 1.0 P value <0.0001b Invasive Disease-Free Survival 0.8 Д8.7% 0.6 T-DXd (n = 818) T-DM1 (n = 817) Censor 0.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 Time, months Number at Risk: T-DXd 818 788 781 776 771 768 758 753 731 684 634 544 440 380 370 275 218 212 129 92 90 46 14 14 0 0 0 0 T-DM1 817 781 769 760 745 734 719 708 687 632 599 527 417 355 337 233 186 177 120 84 79 38 14 13 4 1 1 0 53% reduction in the risk of invasive disease recurrence or death for T-DXd compared with T-DM1 HR, hazard ratio; IDFS, invasive disease-free survival; T-DM1, trastuzumab emtansine; T-DXd, trastuzumab deruxtecan Efficacy stopping boundary, P 0.0183. MDFS is defined as the time from randomization until the date of first occurrence of one of the following events: recurrence of ipsilateral invasive breast tumor, recurrence of ipsilateral locoregional invasive breast cancer, contralateral invasive breast cancer, a distant disease recurrence, or death from any cause. Two-sided Pvalue from stratified log-rank test. Hazard ratio and 95% CI from stratified Cox proportional hazards model with stratification factor of operative status at disease presentation Dr Charles E Geyer Jr Content of this presentation is copyright and responsibility of the author. Permission is required for re-use. BERLIN DESTINY-Breast05 ESMO congress

DESTINY-Breast05 Trial Design

DESTINY-Breast 05 is a phase 3, global, randomized, open-label trial evaluating T-DXd (Enhertu) vs. T-DM1 (Kadcyla) in adult patients with high-risk HER2-positive early breast cancer who have residual invasive disease following neoadjuvant therapy.

Study Design

Phase 3, randomized, open-label, multicenter, global trial; 1,635 patients randomized 1:1 to 14 cycles of either T-DXd or T-DM1.

Population

Adult patients with centrally confirmed HER2-positive (IHC 3+ or ISH+) early breast cancer with residual invasive disease in the breast and/or axillary nodes after neoadjuvant chemotherapy plus HER2-directed therapy — a high-risk-of-recurrence population.

Interventions

Intravenous T-DXd at 5.4 mg/kg every 3 weeks for 14 cycles versus intravenous T-DM1 at 3.6 mg/kg every 3 weeks for 14 cycles.

Endpoints

Primary: investigator-assessed invasive disease-free survival (iDFS). Key secondary: disease-free survival (DFS), overall survival (OS), distant recurrence-free interval, brain metastasis-free interval.

Results, safety and regulatory status are in At a Glance.

FDA Approved May 15, 2026 — New Standard of Care

FDA Adjuvant Approval for HER2+ Residual Disease

Enhertu (fam-trastuzumab deruxtecan-nxki) — approved May 15, 2026 — As adjuvant treatment of adult patients with HER2-positive (IHC 3+ or ISH+) breast cancer who have residual invasive disease following neoadjuvant trastuzumab (with or without pertuzumab) and taxane-based treatment.

Dosing: 5.4 mg/kg IV every 3 weeks for 14 cycles. Black-box warning: interstitial lung disease / pneumonitis and embryo-fetal toxicity.

📄 Source: AstraZeneca Press Release →

KOL Sentiment Table — Verbatim Comments

All KOL commentary on DESTINY-Breast 05 (POSITIVE → NEUTRAL → NEGATIVE). Tweet text is verbatim.

KOLSentimentComment
Hope Rugo ● POSITIVE #SABCS2025 @curijoey and Sybille Loibl present safety data from DB11 and DB05. Most encouraging is the lack of an increase in ILD/pneumonitis when TDXd is given through adjuvant RT. Very careful monitoring and management will be critical in this setting @OncoAlert https://t.co/0abaLOviJc
Yakup Ergn ● POSITIVE #SABCS25 DESTINY-Breast05: Post-neoadjuvant high-risk HER2+ EBC 🔹️iDFS HR 0.47, 3-yr iDFS 92.4% vs 83.7% 🔹️Major reduction in distant relapse (HR 0.49) and early signal of lower CNS events 🔹️Benefit consistent across HR status, nodal burden, operability, and HER2 strata https://t.co/hu2vZNAmmH
Elisabetta Bonzano MD, PhD ● POSITIVE 📌Excellent discussion by @stolaney1 ✨ at Presidential Symposium I #ESMO25 “Reshaping Destiny: trasforming outcomes in high-risk HER2+ BC” DESTINY-Breast05 @OncoAlert #OncoAlertAF @DFCI_BreastOnc https://t.co/XPejMBA96o
UPMC Hillman Cancer Center ● POSITIVE Practice changing data presented #ESMO25 by Dr. Charles Geyer showing significant reduction in risk of recurrence/death from DESTINY-Breast-05. Congratulations Dr. Geyer for this important work &amp; presenting on the world stage! @PittHealthSci @UPMCnews @UPMCPhysicianEd https://t.co/2ZguUP1csH
Mustafa zdoan, MD ● POSITIVE Two positive trials — two crucial questions: Who needs T-DM1 after neoadjuvant T-DXd, and what is the best regimen before maintenance T-DXd?
Mustafa zdoan, MD ● POSITIVE A new era in early HER2+ breast cancer. At #ESMO25, T-DXd outperformed T-DM1 in the adjuvant DESTINY-Breast05 and Surpassed standard ddAC-THP in the neoadjuvant DESTINY-Breast11 Bringing ADCs into the curative setting. Lung monitoring remains essential. #BreastCancer #TDXd https://t.co/7l6ta5HNhX
NEJM ● NEUTRAL Presented at #SABCS25: In patients with HER2-positive early breast cancer and residual disease after neoadjuvant therapy, trastuzumab deruxtecan improved invasive disease–free survival but carried a risk of interstitial lung disease. Full DESTINY-Breast05 phase 3 trial results: https://t.co/gzaCa8RKk2
Santhosh Ambika ● NEUTRAL @dr_yakupergun @SuyogCancer @AnisToumeh @drsarahsam @stolaney1 @OncBrothers @oncologician @PTarantinoMD @JAMouabbi @DrSGraff Go with Tolaney approach to spare unnecessary Rx. https://t.co/C4lvMqBK0t
NEJM ● NEUTRAL Original Article: Trastuzumab Deruxtecan in Residual HER2-Positive Early Breast Cancer (DESTINY-Breast05 phase 3 trial) https://t.co/bSyzhAR3U8 #SABCS25 | @SABCSSanAntonio https://t.co/NxQimnFjIY
Abi Siva MD ● NEUTRAL Noticed in the latest @NCCN update: post-neoadjuvant T-DXd made the list, but neoadjuvant T-DXd + THP didn’t. Curious whether this signals preference for DB-05 vs DB-11, or simply where the evidence is easiest to implement. @PTarantinoMD @JAMouabbi @drsarahsam @OncBrothers https://t.co/VpHLzhDynQ
Stephanie Graff, MD, FACP, FASCO ● NEUTRAL How are we feeling on Sunday morning RE: Destiny Breast 11 (neoadj) and DB-05 (residual disease)? What are we doing in the overlapping population? (Don’t vote just to see; that’s what the bookmark tab is for!) #ESMO25
Paolo Tarantino ● NEUTRAL The KM curve of 2025: among high risk patients with HER2+ eBC and RD, adjuvant T-DXd halved the risk of recurrence vs T-DM1. New SoC for pts with: -inoperable disease at diagnosis -node-positive RD 10.8% rate of ILD, 3 deaths. Remember to monitor the lungs! #ESMOAmbassadors https://t.co/XURyOLXW3q
Sherene Loi, MD ● MIXED DB05 #esmo25 impressive efficacy for post op node + or inoperable at baseline -balanced with ~10%ILD but 👏less CNS 🧠recurrences 🙌 Bravo to those &gt;70% patients putting up with all that nausea!! @myESMO #esmoambassadors @OncoAlert https://t.co/ZGRNomzMJs
Yksel rn ● NEUTRAL Excellent discussion as always by @stolaney1 shedding new light on HER2+ treatment direction.@myESMO #ESMO25 https://t.co/qtBJlrDAne
Stephanie Graff, MD, FACP, FASCO ● NEUTRAL Final tally! 🗳️ #ESMO25 @OncoAlert https://t.co/uIOBSc84GL https://t.co/IMhQ9Sl7vF
Erika Hamilton, MD, FASCO ● NEUTRAL @stolaney1 cautions to follow the trial data for #DB05 Should not use T-DXd in ALL HER-2 + #bcsm with residual disease- only those that met trial entry..really unresectable large size or node positive #ESMO25 #ESMOAmbassadors https://t.co/1tZ4UNvGxA
Oncology Brothers ● NEUTRAL 2. #DESTINYBreast05: PhIII, TDXd vs. TDM1 in high risk (inoperable or LN+) residual disease after NeoAdj chemo for Her2+ Breast Cancer: - ⬆️DFS &amp; iDFS w/ TDXd (HR: 0.47 in both end points). - ILD: 9.6% vs. 1.6% - New SoC/option for that very high risk pt! 4/13 https://t.co/qB2WLwVrcX
Oncology Brothers ● NEUTRAL 6. #DESTINYBreast05: PhIII, TDXd vs. TDM1 in high risk (inoperable or LN+) residual disease after NeoAdj chemo for Her2+ Breast Cancer: - ⬆️ iDFS with TDXd vs. TDM1 in all subgroups - Timings of RT did NOT impact the severity incidence or severity of ILD 7/7 https://t.co/IxH9Sgcmoe https://t.co/YLNtaI6iHj
Paolo Tarantino ● NEUTRAL DESTINY-Breast06: Among pts with endocrine-refractory, HR+/HER2- MBC, 1L T-DXd significantly improved PFS vs cape/taxanes (13.2 vs 8.1 mo, HR 0.62, p&lt;0.001), with a trend in OS (HR 0.83). Most of the pts enrolled had visceral disease. How will this change your practice?
Csar A. Rodrguez ● NEUTRAL News from #ESMO2025 7️⃣ Ladies and Gentlemen… with you the first analysis of DestinyBreast05 Trial @myESMO https://t.co/QKloIesZuZ
Aya Mohamed | MSc, MD ● NEUTRAL The @NEJM DESTINY-Breast05 trial is practice-changing: T-DXd cut recurrence/death risk by ~53% vs T-DM1 in high-risk HER2+ early breast cancer with residual disease after neoadjuvant therapy. @OncoAlert #SABCS25 #BreastCancer #bcsm https://t.co/WJXMf298Rs https://t.co/mj137GbyhD
Oncology Brothers ● NEUTRAL TDXd now @US_FDA ✅ in neoadjuvant and adjuvant high risk residual HER2+ breast cancer based off DESTINYBreast05 and DESTINYBreast11: - ⬆️ pCR &amp; iDFS w/ TDXd - Timings of RT did NOT impact the incidence or severity of ILD - New Soc for high risk disease! #bcsm #OncTwitter https://t.co/G57TyGw8Xh
Toni Choueiri, MD ● NEUTRAL JUST IN: @FDA approves Neoadjuvant Trastuzumab deruxtecan (TdXD) for Her-2 + breast cancer and post residual disease , based upon Destiny breast 011/05 trials. https://t.co/fGjcZZ9Ay9 https://t.co/TDd9xdMYjZ
Susan G. Komen ● NEUTRAL Dr. Charles Geyer presented DESTINY-Breast05: T-DXd vs T-DM1 in HER2+ early BC given after initial treatment for those who have cancer remaining after neoadjuvant treatment. T-DXd cut recurrence risk by ~50% T-DXd poised to replace T-DM1 as SOC (5/5) https://t.co/2f5MU79DnO
BreastCancersToday ● NEUTRAL Behind the scenes with @AmandaNizamMD &amp; @drsarahsam at #ESMO25 discussing the DESTINY-Breast05 study. Full interview coming this week on https://t.co/0OkHxTwXuM! #DESTINYBreast05 #BreastCancer #HER2 #ESMO2025 @DFCI_BreastOnc @myESMO https://t.co/PSWbRUenvf
Dr Sarah Sammons ● NEUTRAL @DrSGraff Residual high risk only
Elisa Agostinetto ● NEUTRAL @Lucarecco @Stefani19753108 @OncoAlert Hi Luca, nice poll! I would recommend post-neoajuvant T-DXd only in the DB-05 criteria (ie, residual disease in the lymphnodes at surgery or inoperable disease at diagnosis) and not for all cases of residual disease! T-DM1 is still SoC for these cases @OncoAlert
NSABP Foundation ● NEUTRAL Interim analysis results DESTINY-Breast05/NSABP B-60 presented during #ESMO25: T-DXd reduced risk of invasive disease recurrence or death by 53% vs T-DM1 in pts w/high-risk HER2-positive #breastcancer w/residual invasive disease following neoadjuvant tx ➡️https://t.co/EQZNiAs2yu https://t.co/Jh465YGVuI
Dr Amol Akhade ● NEUTRAL Trastuzumab deruxtecan gets @US_FDA approval for NACT and for post NACT residual disease , based upon Destiny breast 011 and 05 trials . Expected approval especially for DB 05 setting . @stolaney1 @ErikaHamilton9 @dr_yakupergun @PTarantinoMD @elmayermd @OncoAlert https://t.co/uLDPlpr1LI
● NEUTRAL @Wildingarden In the Phase 3 DESTINY-Breast05 trial (EudraCT 2020-003982-20, the one authorized in Ireland in 2021 for Daiichi Sankyo’s trastuzumab deruxtecan vs. T-DM1), there were two adjudicated Grade 5 (fatal) interstitial lung disease events in the T-DXd arm. These were the only
● NEUTRAL @Wildingarden The specific hospitals where the two adjudicated Grade 5 (fatal) ILD events occurred in the T-DXd arm of DESTINY-Breast05 are not publicly disclosed in the NEJM publication, https://t.co/0AwSOt0GMS (NCT04622319), or related trial materials. Patient-level details like exact
Madeleine Armstrong ● NEGATIVE Enhertu’s perioperative Destiny beckons, but watch out for ILD. The @ApexOnco take on Destiny-Breast05 &amp; Destiny-Breast11 data at #ESMO25 $AZN $DSKNY https://t.co/yIVbe2iT0v
Luca Arecco, MD ● NEGATIVE Over half voters (53%) would opt for TCHP → T-DXd as preferred sequencing in HER2+ eBC setting. The key challenge is now finding the optimal sequencing and patient selection while awaiting further updates from DB-11 and DB-05. @OncoAlert https://t.co/2U9v9dZ5pj
Michael Lam, PharmD, BCOP ● NEGATIVE @NEJM @SABCSSanAntonio Notable takeaway: DESTINY-Breast05 has minimal US enrollment, despite the US accounting for 40% of T-DXd’s global market share. There is a major disconnect between the study population and real-world usage. How much is a vial of T-DXd in the US vs in Asia? https://t.co/tzKZ4YiCU1
Paolo Tarantino ● NEUTRAL PROs from DB05 presented by Carlos Barrios. Preserved QoL with T-DXd (vs T-DM1), with improvement in key domains (pain, arm symptoms) and worsening in social functioning. Overall, they confirm the role of adjuvant T-DXd for patients with high-risk RD. #ESMO26 #ESMOAmbassadors https://t.co/2zoMFUxKh7
Aya Mohamed | MSc, MD 🎗 ● NEUTRAL DESTINY-Breast05: PROs at #ESMO26 HRQoL was largely maintained with both T-DXd and T-DM1 in high-risk HER2+ early breast cancer with residual invasive disease. @OncoAlert #BCSM #BreastCancer https://t.co/3rroj3ppmI
Sara Tolaney ● NEUTRAL DESTINY-Breast05: TDXd for residual HER2+ dz HRQOL maintained with both TDXd + T-DM1 TDXd assoc w/ longer time to deterioration in pain and arm symptoms c/w T-DM1 @OncoAlert #ESMO26 https://t.co/ffHDPkWvh6
Gaia Griguolo ● POSITIVE Great discussion of DestinyBreast05 quality of life data! Similar overall HRQoL, but better pain symptoms (are these relapses?) and worse social functioning with TDXd Preserved QoL does not mean absence of toxicity @OncoAlert #ESMO26 https://t.co/TqjnDWQy67
Elisabetta Bonzano MD, PhD ● NEUTRAL 📌 Rapid Oral Breast Cancer, Early stage ✨Patient-reported outcomes from DESTINY-Breast05: HRQoL with T-DXd versus T-DM1 in patients with high-risk HER2-positive eBC #ESMO26 🇪🇸 @OncoAlert #OncoAlertAF https://t.co/8YCn03ukj9

DESTINY-Breast05 FAQ

What is the DESTINY-Breast05 trial?

DESTINY-Breast05 (NCT04622319) is a Phase 3, global, randomized, open-label trial of adjuvant trastuzumab deruxtecan (T-DXd, Enhertu) versus T-DM1 (Kadcyla) in high-risk HER2-positive early breast cancer with residual invasive disease after neoadjuvant therapy. See Trial Design.

Is adjuvant T-DXd (Enhertu) FDA approved for HER2+ early breast cancer?

Yes. On May 15, 2026 the FDA approved Enhertu as adjuvant treatment for HER2-positive breast cancer with residual invasive disease after neoadjuvant trastuzumab-based and taxane-based treatment, based on DESTINY-Breast05. See FDA Approval.

What were the DESTINY-Breast05 iDFS results?

T-DXd improved invasive disease-free survival versus T-DM1 at the interim analysis (HR 0.47). Confidence interval, 3-year rates and source: At a Glance.

Is overall survival data mature in DESTINY-Breast05?

No. Overall survival was immature at the interim analysis and the final analysis is pending. See At a Glance.

How is adjuvant Enhertu dosed and what are its warnings?

Enhertu is given intravenously every 3 weeks for 14 cycles and carries a boxed warning for interstitial lung disease/pneumonitis and embryo-fetal toxicity. Dose and ILD rates: At a Glance.