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Long Term Therapeutic Plan for Patients with Non-Small Cell Lung Cancer Harboring EGFR Mutation

결핵및호흡기질환
2014년 76권 1호 p.8 ~ p.14
장승훈 ( Jang Seung-Hun ) - Hallym University College of Medicine Department of Internal Medicine

Abstract

Non-small cell lung cancer harboring epidermal growth factor receptor (EGFR) sensitizing mutations has a distinct disease entity. Patients with this cancer have better prognosis, and frequently achieve long-term survival. EGFR-tyrosine kinase inhibitor (TKI) is the drug of choice for this cancer; but the disease inevitably progresses, after durable response. The tumor is a mixture of EGFR-TKI sensitive clones and resistant clones, regardless of their molecular mechanisms. EGFR-TKI sensitive clones are very susceptible to this drug, but rarely eradicated; so, withdrawal of the drug permits rapid regrowth of drug sensitive clones, possibly causing “disease flare.” Re-administration or continuation of EGFR-TKI can effectively suppress the expansion of drug sensitive clones, even when the total tumor volume continuously increases. Chemotherapy can definitely prolong the survival of patients experiencing EGFR-TKI failure. Prospective clinical trials are warranted to compare efficacies of chemotherapeutic agents. A few retrospective studies suggested that a taxane-based regimen may be superior to others. Here, we reviewed therapeutic options and clinical evidence about this unique disease entity.

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학술진흥재단(KCI) KoreaMed 대한의학회 회원 
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