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 BNT323/DB-1303, Doxorubicin, or Paclitaxel. The registry lists allocation as randomized. The study is divided into two cohorts (Cohort 1 and Cohort 2), to which you would be enrolled based on the amount of human epidermal growth factor receptor 2 (HER2) in their tumor sample.
They plan to enroll about 480 people at 214 sites. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
A Phase III, Randomized, Multi-site, Open-label Trial of BNT323/DB-1303 Versus Investigator's Choice of Chemotherapy in Previously Treated Patients With HER2- Expressing Recurrent Endometrial Cancer
Interventions: BNT323/DB-1303, Doxorubicin, Paclitaxel, Docetaxel
Primary outcome (registry wording): Cohort 1: PFS assessed by blinded independent central review (BICR) in participants with HER2 IHC 1+/2+ recurrent endometrial cancer