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Central Nervous System Disease in Patients With RET Fusion-Positive NSCLC Treated With Selpercatinib. | LitMetric

Central Nervous System Disease in Patients With RET Fusion-Positive NSCLC Treated With Selpercatinib.

J Thorac Oncol

Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York; Department of Medicine, Weill Cornell Medical College, New York, New York. Electronic address:

Published: May 2023

AI Article Synopsis

Article Abstract

Introduction: Central nervous system (CNS) metastases develop in nearly half of patients with RET fusion-positive NSCLCs and cause morbidity and mortality. The selective RET inhibitor selpercatinib treats existing intracranial disease, but no studies have investigated whether early initiation of selpercatinib is associated with decreased development of CNS metastases.

Methods: A total of 61 patients with RET fusion-positive advanced NSCLC with and without CNS metastases treated with selpercatinib on the LIBRETTO-001 trial (NCT03157128) or the LIBRETTO-201 expanded access program (NCT03906331) were identified. Cumulative incidence rates (CIRs) for CNS metastases were assessed as an event of interest; systemic progression of disease and death were considered competing risks.

Results: The median age was 65 years, and the most common 5' fusion partners were KIF5B (67%) and CCDC6 (18%). There were 24 patients (39%) who received prior platinum chemotherapy and 20 patients (33%) who received prior multikinase inhibition. The median time on selpercatinib was 21.8 months. Furthermore, 30 patients (49%) had CNS disease at baseline and 31 patients (51%) had no baseline CNS disease. CIRs of CNS progression among patients with baseline CNS disease were 3% (95% confidence interval [CI]: 0%-10%), 10% (95% CI: 0%-22%), 17% (3%-30%), 17% (3%-30%), and 20% (5%-35%) at 6, 12, 18, 24, and 36 months, respectively. CIR for CNS progression among patients without baseline CNS disease was 0% at 6, 12, 18, 24, and 36 months (95% CI: 0%-0%).

Conclusions: CNS progression was not observed with selpercatinib therapy in patients without baseline CNS disease. CNS progression on selpercatinib was rare in patients with baseline CNS disease. Early initiation of selpercatinib is associated with decreased rates of CNS metastasis formation and progression and may play a preventive role.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10122712PMC
http://dx.doi.org/10.1016/j.jtho.2023.01.008DOI Listing

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