This is a clinical retrospective study that will collect and analyze clinical data from all patients treated with fumeitinib mesylate in the Oncology Department of Tiantan Hospital between January 1, 2020 and May 31, 2025. The data collection will include general demographic characteristics (gender, age, family history, smoking history, etc.), clinicopathological features, NGS test reports, fumeitinib initiation time and dosage, concomitant medications, local treatments (surgery, radiotherapy, etc.), and baseline and follow-up imaging examinations related to efficacy and safety. The study will conduct: 1) clinical data analysis; and 2) exploration of resistance-related clinical characteristics and influencing factors.
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iPFS
Timeframe: From first dose until the event of interest, assessed between January 1, 2020 and May 30, 2025