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 IMA203, nivolumab plus relatlimab, or lifileucel. The registry lists allocation as randomized. This clinical trial is a prospective, multicenter, open-label, randomly assigned, actively controlled, parallel-group Phase 3 clinical trial to measure the how well it works, whether it is safe and how hard side effects are to live with of treatment with IMA203 administered at the recommended phase 2 dose versus investigator's choice of treatment in patients with previously treated, unresectable or metastatic cutaneous melanoma or mucosal melanoma (MM).
They plan to enroll about 450 people at 71 sites. Taking part typically means taking a study drug (or dummy pill), an infusion or injection of a biologic plus check-ins.
Official title (unrewritten)
A Prospective, Multicenter, Open-label, Randomized, Actively Controlled, Parallel-group Phase 3 Clinical Trial to Evaluate Efficacy, Safety, and Tolerability of IMA203 Versus Investigator's Choice of Treatment in Patients With Previously Treated, Unresectable or Metastatic Cutaneous Melanoma (ACTengine® IMA203-301)
Interventions: IMA203, nivolumab plus relatlimab, lifileucel, nivolumab, pembrolizumab, ipilimumab, Dacarbazine, temozolomide, paclitaxel, paclitaxel plus carboplatin, Albumin-Bound Paclitaxel
Primary outcome (registry wording): Progression-free survival assessed by BICR