Screening for germline EGFR T790M mutations through lung cancer genotyping.

Journal of Thoracic Oncology : Official Publication of the International Association for the Study of Lung Cancer
Geoffrey R OxnardMaria E Arcila

Abstract

The study of patients carrying germline epidermal [corrected] growth factor receptor (EGFR) mutations, which have been found in cases of familial lung adenocarcinoma, could provide unique insight into lung cancer risk and carcinogenesis in never-smokers. However, investigations into the biology of germline EGFR mutations have been hampered by the lack of an effective strategy for screening for carriers. We hypothesized that patients with lung cancers found to harbor the EGFR T790M resistance mutation before treatment, an uncommon occurrence, would be likely to carry underlying germline T790M mutations. Eleven unrelated patients with lung cancer, harboring an EGFR T790M mutation, were identified from a 7-year institutional experience with tumor genotyping. Ten patients had benign tissue available, which was anonymously tested for the presence of germline EGFR mutations. Five of 10 cases carried a germline T790M mutation (50%, confidence interval 27%-73%). One patient's cancer exhibited a distinctive indolent growth, which has also been described in preclinical studies of T790M-mutant cancers. A second patient underwent resection of six separate primary lung adenocarcinomas, each carrying different sensitizing EGFR mutations and ...Continue Reading

Associated Clinical Trials

Dec 21, 2012·Geoffrey Oxnard, MD

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