[Outcomes of chemotherapy in patients with EGFR mutation-negative non-small cell lung cancer].
OBJECTIVE
To evaluate the efficacy of chemotherapy for patients with EGFR (exon 19 and 21) mutation-negative non-small cell lung cancer (NSCLC).


METHODS
One hundred and forty NSCLC patients with negative EGFR mutation (90 cases) or EGFR mutation (50 cases) underwent gemcitabine or vinorelbine plus cisplatin or carboplatin chemotherapy.


RESULTS
In the EGFR mutation-negative patients, there were PR in 26 cases, SD in 48 cases, PD in 16 cases, the disease control rate was 82.2%. In the patients with EGFR mutation, there were PR in 14 cases, SD in 23 cases, PD in 13 cases, the disease control rate was 74.0%. The difference of disease control rates in the two groups was not significant (P = 0.250). The progression free survival (PFS) of EGFR mutation-negative patients was 4.2 months (95%CI 3.8-4.6) vs. 4.0 months (95%CI 3.6-4.4) in patients with EGFR mutation, with a significant difference (P = 0.021). The overall survival (OS) of EGFR mutation-negative patients was 9.2 months (95%CI 8.4-10.0) vs. 7.8 months (95%CI, 6.9-8.7) of patients with EGFR mutation (P = 0.028).


CONCLUSIONS
Chemotherapy can prolong the PFS and OS of EGFR mutation-negative patients. However, only the extension of OS has practical significance.
Department of Oncology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China.
Jun
J
Zhu
Jie
J
Zhang
Mo
M
Chen
Cai-cun
CC
Zhou
D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D016190:Carboplatin / Q000008:administration & dosage; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism; D002945:Cisplatin / Q000008:administration & dosage; D003841:Deoxycytidine / Q000008:administration & dosage / Q000031:analogs & derivatives; D018450:Disease Progression; D018572:Disease-Free Survival; D066246:ErbB Receptors / Q000235:genetics / Q000378:metabolism*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009154:Mutation; D012074:Remission Induction; D015996:Survival Rate; D014747:Vinblastine / Q000008:administration & dosage / Q000031:analogs & derivatives; D000077235:Vinorelbine; D000093542:Gemcitabine
D003841:Deoxycytidine; D014747:Vinblastine; D016190:Carboplatin; D066246:ErbB Receptors; D002945:Cisplatin; D000077235:Vinorelbine; D000093542:Gemcitabine