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 GammaTile®, External Beam Radiation Therapy, or Temozolomide. The registry lists allocation as randomized. This is a Phase 3 prospective, randomly assigned, superiority, open-label, multi-site study.
They plan to enroll about 766 people at 22 sites. Taking part typically means taking a study drug (or dummy pill), using or being fitted with a device, a procedure as part of the study plus check-ins.
Official title (unrewritten)
Randomized Study of Resection and GammaTile® Followed by Concurrent External Beam Radiation Therapy (EBRT) and Temozolomide (TMZ) and Adjuvant TMZ Versus Standard of Care in Newly Diagnosed Glioblastoma (GBM)
Interventions: GammaTile®, External Beam Radiation Therapy, Temozolomide
Primary outcome (registry wording): Overall Survival