What this phase means
Phase 2: researchers already know a roughly safe dose (from phase 1). This stage asks whether the treatment actually helps the condition, and watches side effects more closely.
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 Osimertinib, or Stereotactic Radiosurgery. The registry lists allocation as na. The goal of this clinical trial is to learn whether adding stereotactic radiosurgery (SRS) or fractionated stereotactic radiotherapy (SRT), delivered on a linear accelerator (LINAC), to osimertinib improves control of brain metastases in adults with stage IV non-small cell lung cancer (NSCLC) carrying a sensitizing EGFR mutation (exon 19 deletion or exon 21 L858R) whose brain metastases cause neurological symptoms (present at diagnosis or arising during osimertinib treatment).
They plan to enroll about 41 people at Ho Chi Minh City. Taking part typically means taking a study drug (or dummy pill), a procedure as part of the study plus check-ins.
Official title (unrewritten)
Osimertinib Combined With LINAC-Based Stereotactic Radiosurgery or Stereotactic Radiotherapy for Brain Metastases in EGFR-Mutant Stage IV Non-Small Cell Lung Cancer: A Prospective Single-Arm Interventional Study
Interventions: Osimertinib, Stereotactic Radiosurgery
Primary outcome (registry wording): Intracranial objective response rate (iORR)