The prevalence of EGFR mutations in non-small cell lung cancer in an unselected Caucasian population

TY - JOUR

T1 - The prevalence of EGFR mutations in non-small cell lung cancer in an unselected Caucasian population

AU - Skov, Birgit G

AU - Høgdall, Estrid

AU - Clementsen, Paul

AU - Krasnik, Mark

AU - Larsen, Klaus Richter

AU - Sørensen, Jens Benn

AU - Skov, Torsten

AU - Mellemgaard, Anders

N1 - © 2014 APMIS. Published by John Wiley & Sons Ltd.

PY - 2015/2/1

Y1 - 2015/2/1

N2 - EGFR mutation frequencies in unselected Caucasian populations are unknown. This study assesses the prevalence of EGFR mutations in an unselected population-based cohort, and the correlation between mutation and gender, age, ethnicity, smoking habits, and pathological data. NSCLC patients diagnosed in a well-defined Danish population were included. The type of the diagnostic material, and data on smoking were registered. The mutation analyses were investigated by Therascreen EGFR RGQ-PCR Kit or Sanger sequencing. A total of 658 men and 598 women were included. 6.2% were never smokers, 38.9% were ex-smokers, and 54.9% were current smokers. One thousand one hundred and sixty-one (92.4%) patients had sufficient material for mutation analysis. Cytological material was used for 38% of the mutation analyses. 5.4% had mutation in the EGFR gene (4.3% men/6.7% women). 87% were activating mutations. 8.0% of adenocarcinomas, and 1.9% of squamous cell carcinomas were mutated. 29.4%, 4.4% and 2.9% of never, ex- and current smokers were mutated (p < 0.001). No difference in mutation rate was observed between patients with cytology only, histology only or both cytology and histology available. 5.4% of the patients had EGFR mutation. Adenocarcinomas were mutated more often (8.0%) than squamous cell carcinomas (1.9%). Mutations were found in never smokers as well as in former and current smokers. No difference in gender and age regarding mutation status was observed. EGFR mutations analysis was possible in almost all patients with no difference between cytology and histology specimens.

AB - EGFR mutation frequencies in unselected Caucasian populations are unknown. This study assesses the prevalence of EGFR mutations in an unselected population-based cohort, and the correlation between mutation and gender, age, ethnicity, smoking habits, and pathological data. NSCLC patients diagnosed in a well-defined Danish population were included. The type of the diagnostic material, and data on smoking were registered. The mutation analyses were investigated by Therascreen EGFR RGQ-PCR Kit or Sanger sequencing. A total of 658 men and 598 women were included. 6.2% were never smokers, 38.9% were ex-smokers, and 54.9% were current smokers. One thousand one hundred and sixty-one (92.4%) patients had sufficient material for mutation analysis. Cytological material was used for 38% of the mutation analyses. 5.4% had mutation in the EGFR gene (4.3% men/6.7% women). 87% were activating mutations. 8.0% of adenocarcinomas, and 1.9% of squamous cell carcinomas were mutated. 29.4%, 4.4% and 2.9% of never, ex- and current smokers were mutated (p < 0.001). No difference in mutation rate was observed between patients with cytology only, histology only or both cytology and histology available. 5.4% of the patients had EGFR mutation. Adenocarcinomas were mutated more often (8.0%) than squamous cell carcinomas (1.9%). Mutations were found in never smokers as well as in former and current smokers. No difference in gender and age regarding mutation status was observed. EGFR mutations analysis was possible in almost all patients with no difference between cytology and histology specimens.

KW - Adult

KW - Aged

KW - Aged, 80 and over

KW - Carcinoma, Non-Small-Cell Lung

KW - DNA Mutational Analysis

KW - European Continental Ancestry Group

KW - Female

KW - Humans

KW - Lung Neoplasms

KW - Male

KW - Middle Aged

KW - Mutation

KW - Mutation Rate

KW - Neoplasm Metastasis

KW - Prospective Studies

KW - Receptor, Epidermal Growth Factor

KW - Smoking

KW - Young Adult

U2 - 10.1111/apm.12328

DO - 10.1111/apm.12328

M3 - Journal article

C2 - 25421919

SN - 0903-465X

VL - 123

SP - 108

EP - 115

JO - APMIS. Supplementum

JF - APMIS. Supplementum

IS - 2

ER -