Open AccessEffective targeted therapy based on dynamic monitoring of gene mutations in non-small cell lung cancer
Author(s) -
Tan Deng,
Jiao Tang,
Lijun Zhou,
Hong Duan
Publication year - 2019
Publication title -
translational lung cancer research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.474
H-Index - 41
eISSN - 2226-4477
pISSN - 2218-6751
DOI - 10.21037/tlcr.2019.08.06
Subject(s) - medicine , osimertinib , erlotinib , t790m , lung cancer , crizotinib , epidermal growth factor receptor , oncology , personalized medicine , liquid biopsy , disease , precision medicine , mutation , cancer , gene , bioinformatics , pathology , genetics , biology , gefitinib , malignant pleural effusion
With the rapid development of precision medicine, next generation sequencing (NGS) has provided the ability to decode tumors at the DNA level. In treatment of patients with non-small cell lung cancer (NSCLC), it is of great importance to identify epidermal growth factor receptor ( EGFR ) mutations and drug resistance mechanisms in the late stages. A Chinese Han male patient (64 years old) who was initially diagnosed with EGFR-19-deletion-positive advanced NSCLC had a satisfactory clinical response after treatment with erlotinib. Subsequently, the disease progressed and NGS in plasma-derived circulating tumor DNA (ctDNA) revealed T790M mutation. The patient was then treated with osimertinib. In addition, NGS in ctDNA was performed again after the disease progressed, suggesting that MET was amplified, and then the patient was alternatively treated with combination therapy of crizotinib and erlotinib. The disease progressed for the third time, and treatment with osimertinib was undertaken again according to the T790M testing results. Dynamic monitoring of ctDNA was found to be helpful in selecting the appropriate treatment methods and prolonging the survival time of the patient.