This is a randomized, controlled, open-label, multicenter Phase III clinical study designed to evaluate the efficacy and safety of oral HS-10504 monotherapy versus platinum-based doublet chemotherapy in participants with locally advanced or metastatic NSCLC harboring EGFR C797S mutation after failure of EGFR TKI therapy.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
206
HS-10504 tablet
Participants will receive 4 cycles of standard platinum-based doublet chemotherapy (selected by the investigator based on participant's condition and tolerance): * Option 1: Pemetrexed 500 mg/m² IV infusion + Cisplatin 75 mg/m² IV infusion on Day 1 of each 21-day cycle. * Option 2: Pemetrexed 500 mg/m² IV infusion + Carboplatin AUC 5 IV infusion on Day 1 of each 21-day cycle. * Substitution Rule: Cisplatin and carboplatin may be substituted if intolerable due to safety, while maintaining 4 total cycles of platinum-based therapy.
Progression Free Survival (PFS)
Progression Free Survival (PFS) as assessed by Blinded independent Central Review (BICR) per RECIST 1.1
Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.
Overall Survival (OS)
Overall survival (OS)
Time frame: Start of study drug to Survival Endpoint through study completion, an average of 3 years.
PFS
PFS assessed by Investigator assessment per RECIST 1.1
Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.
ORR
Confirmed ORR by BICR and Investigator per RECIST 1.1
Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.
DoR
DoR by BICR and Investigator per RECIST 1.1
Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.
DCR
DCR by BICR and Investigator per RECIST 1.1
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Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.
AE
AE assessed by investigators.
Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.
SAE
SAE assessed by investigators.
Time frame: From baseline, then every 6 weeks, until disease progression or discontinuation from study. From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months.