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Ref Type Journal Article
PMID (27565911)
Authors Johnson AC, Dô P, Richard N, Dubos C, Michels JJ, Bonneau J, Gervais R
Title Identification of I1171N resistance mutation in ALK-positive non-small-cell lung cancer tumor sample and circulating tumor DNA.
Journal Vol Issue Date Pages Journal Short Title
Lung cancer (Amsterdam, Netherlands) 99 2016 Sep 38-40 Lung Cancer
URL
Abstract Text Anaplastic lymphoma kinase (ALK)-rearranged non-small cell lung cancer (NSCLC) is sensitive to ALK inhibitor therapy, but resistance invariably develops and can be mediated by certain secondary mutations. The detection of these mutations is useful to guide treatment decisions, but tumors are not always easily accessible to re-biopsy. We report the case of a patient with ALK-rearranged NSCLC who presented acquired resistance to crizotinib and then alectinib. Sequencing analyses of DNA from a liver metastasis biopsy sample and circulating tumor DNA both found the same I1171N ALK kinase domain mutation, known to confer resistance to certain ALK inhibitors. However, the patient then received ceritinib, a 2nd generation ALK inhibitor, and achieved another partial response. This case underlines how ALK resistance mutation detection in peripheral blood could be a reliable, safer, and less invasive alternative to tissue-based samples in NSCLC.

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