ORIGINAL RESEARCH ARTICLE
The relationship between EGFR mutation and metastasis pattern in lung adenocarcinoma
Received Date : 19 Jun 2019
Accepted Date : 06 Aug 2019
Ismail Beypinara, Hacer Demira, Murat Arazb, Mukremin Uysala
aAfyonkarahisar Health Sciences University School of Medicine, Department of Internal Medicine and Medical Oncology, Turkey
bNecmettin Erbakan University School of Medicine, Department of Internal Medicine and Medical Oncology, Turkey
Doi: 10.1016/j.jons.2019.08.002 - Article's Language: EN
J Oncol Sci 5 (2019) 65-69
ABSTRACT
Aim: The metastatic pattern of non-small cell lung cancer (NSCLC) has been described in several studies.
Frequent metastatic sites are lung, liver, bone, surrenal, and brain. Hypotheses were speculated to explain
the tendency of specific sites. Over-expression of EGFR alters the biology and tumoral behavior. The
mutations of EGFR mainly occur in exon 19, and 21and could lead the way through the tumor growth and
metastasis. We try to elucidate the relationship between EGFR mutation and metastatic pattern.
Material and Method: In this retrospective nested case-control study, one hundred and five patients
diagnosed with lung adenocarcinoma included who had EGFR mutation status and imaging studies at
the time of diagnosis.
Results: The metastatic pattern was not different between EGFR mutant and wild type patients. There
was no statistical difference in terms of survival between EGFR mutant and wild type patients (p ¼ 0.25).
The OS according to the organ metastasis between EGFR mutant and wild type group was not significant
except liver. The EGFR mutant patients with liver metastasis had better survival compared with wild type
patients (p ¼ 0.04). Also, the multiplicity and solidarity of the metastatic tumors were compared in
metastatic organs. There was no significant difference between groups. The subsequent EGFR mutation
type was not related to the metastatic pattern.
Conclusion: The incidence of the metastatic sites was not different between EGFR mutant and wild type
patients in our study. In contrast to the literature, liver metastasis found to be related to improved OS.
Keywords: Non-small cell lung cancer Adenocarcinoma EGFR mutation Metastasis pattern
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