title: [EGFR gene mutation status among lung cancer patients in China].
abstract: OBJECTIVE
  To investigate EGFR gene mutations in non-small cell lung cancers (NSCLCs) and their correlation with clinicopathologic features and clinical characteristics in Chinese NSCLC patients.
  
  
  METHODS
  To analyse EGFR mutations of exons 19 and 21 in NSCLCs by PCR amplification and sequencing.
  
  
  RESULTS
  Somatic mutations in TK domain of EGFR were found in 13 cases (17.3%), the majority of mutations were in-frame exon 19 (9.3%) and 6 cases missense mutation in exon 21 (8.0%). The mutation rate was significantly higher in adenocarcinoma (12/31, 38.7%), than in bronchioloalveolar cancer (1/10, 10. 0%), adeno-squamous carcinoma (0/5), pulmonary blastoma (0/2), large cell carcinoma (0/1) and squamous cell carcinoma (0/26). Moreover, mutations were more frequently observed in females (30.0%) than in males (8.9%), and significantly higher in non-smokers (28.2%) than in smokers (5.6%).
  
  
  CONCLUSIONS
  EGFR gene mutation is significantly higher related to adenocarcinomas, females and never-smokers. The results may suggest that a lager portion of adenocarcinomas in Chinese patients, females and non-smokers could be associated with favorable response to gefinib.
authors.affiliation: Department of Molecular Biology, Institute of Basic Medicine, Chinese PLA General Hospital, Beijing 100853, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Ya-li
authors.initials: YL
authors.lastname: Zhao
authors.forename: Hao-jie
authors.initials: HJ
authors.lastname: Hao
authors.forename: Xiang-hong
authors.initials: XH
authors.lastname: Li
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy / Q000235:genetics; D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use; D001483:Base Sequence; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy / Q000235:genetics*; D004252:DNA Mutational Analysis; D066246:ErbB Receptors / Q000235:genetics*; D005091:Exons / Q000235:genetics; D005260:Female; D000077156:Gefitinib; D005787:Gene Frequency; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009154:Mutation; D017354:Point Mutation; D047428:Protein Kinase Inhibitors / Q000627:therapeutic use; D011799:Quinazolines / Q000627:therapeutic use; D017384:Sequence Deletion; D012737:Sex Factors; D012907:Smoking; D016896:Treatment Outcome
chemical_list: D000970:Antineoplastic Agents; D047428:Protein Kinase Inhibitors; D011799:Quinazolines; D066246:ErbB Receptors; D000077156:Gefitinib