OnCo
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DESTINY-PanTumor02

Enhertu shrank tumours across many HER2-positive cancers, with endometrial cancer among the best responders, leading to the first tumour-agnostic HER2 approval.

Endometrial cohort ORR 57.5% overall and 84.6% in IHC 3+; cervical cohort ORR 50% (75% in IHC 3+) (JCO 2024). FDA accelerated approval April 2024 for HER2 IHC 3+ solid tumours with no satisfactory alternative. HER2 testing is now recommended in serous endometrial carcinoma.

Setting
HER2-expressing (IHC 2+/3+) solid tumours after ≥1 line, seven cohorts including endometrial and cervical: trastuzumab deruxtecan
Phase
Phase 2
Sponsor
AstraZeneca / Daiichi Sankyo
Registry
Headline result
Endometrial ORR 57.5% (84.6% in IHC 3+); cervical ORR 50%.
Reported
2023
Enrolled
267

Outcomes

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In plain words
What these results mean for people, not percentages
267 people took part
Objective response rate, endometrial cohortprimaryresponse endpoint
  • 57.5 vs 84.6 out of 100 had their tumour shrink with T-DXd (all HER2 IHC 2+/3+) compared with T-DXd (IHC 3+ only); 27.1 fewer per 100.
  • On this measure the first group did worse, not better.
Objective response rate, cervical cohortresponse endpoint
  • 50 out of 100 people had their tumour shrink with T-DXd (all).
  • There was no comparison group, so this number cannot tell you how much of the effect is due to the treatment.
Be careful
  • A response rate counts how many people had their tumours shrink by a set amount; shrinking is encouraging but does not by itself show that people live longer or feel better.
  • These results apply to the people the trial enrolled: HER2-expressing (IHC 2+/3+) solid tumours after ≥1 line, seven cohorts including endometrial and cervical: trastuzumab deruxtecan. People in a different situation may not see the same effect.
  • The trial selected people by a biomarker (HER2); the result should not be assumed for people whose cancer does not have it.

Numbers are from the trial as recorded here; see the source links in the table below. This is orientation, not medical advice: ask your team how closely the trial population matches you.

267 participants enrolled.

Objective response rate, endometrial cohortprimary
T-DXd (all HER2 IHC 2+/3+)57.5 of 100
n = 40
T-DXd (IHC 3+ only)84.6 of 100
n = 13
Source
Objective response rate, cervical cohort
T-DXd (all)50 of 100
n = 40
Source
EndpointArmnValueHR (95% CI)pSource
Objective response rate, endometrial cohortprimaryT-DXd (all HER2 IHC 2+/3+)4057.5%link
T-DXd (IHC 3+ only)1384.6%
Objective response rate, cervical cohortT-DXd (all)4050%link

Connected

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