Abstract:

Objective To investigate the efficacy of Zorifertinib in first-line treatment of patients with untreated epidermal growth factor receptor (EGFR) mutation in non-small-cell lung cancer (NSCLC) with central nervous system (CNS) metastases. Methods Two patients received Zorifertinib as first-line treatment. The response of tumor treatment was evaluated by response evaluation criteria in solid tumors version 1.1 (RECEST v1.1) and RANO criteria for brain metastases (RANO-BM). Results Case 1 had EGFR exon 19del mutation and multiple brain metastases at baseline. After 51.4 months of treatment with Zorifertinib, case 1 still maintained partial response (PR) in lung lesions and complete response (CR) in intracranial lesions. Case 2 had EGFR exon 19del mutation and a single brain metastasis at baseline. Case 2 achieved PR in lung lesions and CR in intracranial lesions during the treatment with Zorifertinib. After 13.7 months, lung disease progression (PD) and new single brain metastases occurred. The comprehensive evaluation was PD. Case 1 had three-grade treatment-related adverse events (TRAEs), including dry skin, and other TRAEs were rash, abnormal liver function and diarrhea. The TRAEs were generally controllable. Conclusion Zorifertinib has a good effect on controlling intracranial and extracranial lesions in patients with EGFR-mutated NSCLC with CNS metastases. The efficacy of Zorifertinib is consistent with the EVEREST study. Zorifertinib can be one of the first-line initial treatment options.

Key words: ErbB receptors, carcinoma, non-small-cell lung, progression-free survival, central nervous system metastases, Zorifertinib