Durable Response to Tyrosine Kinase Inhibitor Therapy in a Lung Cancer Patient Harboring Epidermal Growth Factor Receptor Tandem Kinase Domain Duplication 

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Durable Response to Tyrosine Kinase Inhibitor Therapy in a Lung Cancer Patient Harboring Epidermal Growth Factor Receptor Tandem Kinase Domain Duplication  Christina S. Baik, MD, MPH, David Wu, MD, PhD, Christina Smith, Renato G. Martins, MD, MPH, Colin C. Pritchard, MD, PhD  Journal of Thoracic Oncology  Volume 10, Issue 10, Pages e97-e99 (October 2015) DOI: 10.1097/JTO.0000000000000586 Copyright © 2015 International Association for the Study of Lung Cancer Terms and Conditions

FIGURE 1 Pregefitinib and post-gefitinib computed tomography images; patient started gefitinib on July 16, 2003 (computed tomography images: July 2003 and November 2004). Journal of Thoracic Oncology 2015 10, e97-e99DOI: (10.1097/JTO.0000000000000586) Copyright © 2015 International Association for the Study of Lung Cancer Terms and Conditions

FIGURE 2 EGFR tandem kinase domain duplication (TKD-EGFR). A tandem duplication of EGFR exons 18 to 25 was detected by targeted next-generation sequencing. A, Genomic position of TKD-EGFR mutation. B, Schematic of native EGFR protein and TKD-EGFR. Amino acid positions given at bottom. C, Sanger sequencing confirmation of genomic breakpoints showing fusion of intron 25 to intron 17. Genomic breakpoints are hg19 coordinates. Journal of Thoracic Oncology 2015 10, e97-e99DOI: (10.1097/JTO.0000000000000586) Copyright © 2015 International Association for the Study of Lung Cancer Terms and Conditions