We present a patient with Anaplastic lymphoma kinase (ALK) fusion lung adenocarcinoma who received sequential treatment with ALK tyrosine kinase inhibitor (TKI) (crizotinib, PFS:32.3 months and then conteltinib, PFS: 29 months). Subsequently, the patient switched to third generation EGFR-TKI treatment with almonertinib. This case suggests EGFR mutation is one of the mechanisms of ALK-TKI resistance, highlights the value of re-biopsy in identifying potentially targetable resistance mechanisms and underscores the spatiotemporal heterogeneity of tumors under the selective pressure of ALK-TKI.
In this study, conteltinib showed manageable safety profile, favorable PK properties, and anti-tumor activity in advanced ALK-positive NSCLC patients. The recommended phase 2 dose was determined to be 600 mg QD for ALK TKI-naïve patients and 300 mg bis in die (BID) for patients who received crizotinib previously.