This is an open label, multi-center phase II study to evaluate the efficacy and safety in EGFR mutated NSCLC patients with brain or leptomeningeal metastases. The patients will be assigned to the appropriate treatment cohorts based on the criteria.
To evaluate the efficacy and safety of TY-9591 tablets in the treatment of EGFR mutation-positive non-small cell lung cancer (NSCLC) patients with brain or leptomeningeal metastases.