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Sarcomatoid carcinoma transformation: a rare manifestation of EGFR TKI drug resistance in a patient with lung adenocarcinoma
XU Song 1 *,LIU Renwang 2,LIU Xia 3,SHI Tao 2,LI Xiongfei 2,ZHONG Diansheng 3,WANG Yan 3,CHEN Gang 2,CHEN Jun 2
1.Department of Lung Cancer Surgery, Tianjin Medical University General Hospital
2.Department of Lung Cancer Surgery, Tianjin Medical University General Hospital
3.Department of Medical Oncology, Tianjin Medical University General Hospital
*Correspondence author
#Submitted by
Subject:
Funding: Specialized Research Fund for the Doctoral Program of Higher Education (No.20131202120004), National Natural Science Foundation of China (No.81301812)
Opened online:21 April 2017
Accepted by: none
Citation: XU Song,LIU Renwang,LIU Xia.Sarcomatoid carcinoma transformation: a rare manifestation of EGFR TKI drug resistance in a patient with lung adenocarcinoma[OL]. [21 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725568
 
 
Objective: Almost all EGFR-mutant lung cancers develop resistance to EGFR tyrosine kinase inhibitors (EGFR-TKIs). Several mechanisms for this acquired resistance have been identified, including development of an EGFR T790M mutation, MET amplification, hepatocyte growth factor (HGF) overexpression, loss of PTEN expression, epithelial to mesenchymal transition and transformation to small cell lung cancer. Herein, we presented a lung cancer patient with EGFR exon 19 deltion who was resistant to EGFR TKI treatment. Method: To further explore the underlying mechanisms, we performed a gene mutation profiling by next generation sequencing (NGS). Results: The mechanism of drug resistance is very rare. Some adenocarcinoama cells aquired T790M mutation in EGFR exon 20, and other adenocarcinoama cells transformed into sarcomatoid carcinoma. Conclusion: This case inspires us again the importance of tissue re-biopsy once the acquired resistance occurs after TKI consistant pressure. Sarcomatoid carcinoma transformation is a rare manifestation of EGFR TKI drug resistance in a patient with lung adenocarcinoma.
Keywords:drug resistance; adenocarcinoma; sarcomatoid carcinoma; EGFR-TKI
 
 
 

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