What this phase means
Phase 3: this treatment already looked useful in smaller studies. Now it is tested in a large group, often against standard care or a dummy treatment, to see if it should be approved.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are Trastuzumab Deruxtecan, or Chemotherapy. The registry lists allocation as randomized. This study is designed to assess how well it works and safety of T-DXd adjuvant therapy, with or without radiotherapy, post-surgery in anticancer treatment naïve (including neoadjuvant therapy) endometrial cancer with various HER2 expression levels.
They plan to enroll about 710 people at 86 sites. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
A Phase 3, Multicenter, Randomized, Open-label Trial of Trastuzumab Deruxtecan Versus Standard of Care Chemotherapy With or Without Radiotherapy as Adjuvant Treatment for HER2-Expressing (IHC 3+/2+) Endometrial Cancer (DESTINY-Endometrial02/ GOG-3122/ ENGOT-en30/GINECO)
Interventions: Trastuzumab Deruxtecan, Chemotherapy
Primary outcome (registry wording): Disease-Free Survival (DFS) as Assessed by Blinded Independent Central Review or by Histopathologic Confirmation of Disease Recurrence per Local Assessment