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Diffusion-Weighted Imaging of Brain Metastasis from Lung Cancer: Correlation of MRI Parameters with the Histologic Type and Gene Mutation Status

Authors
Jung, WS; Park, CH; Hong, CK; Suh, SH; Ahn, SJ
Citation
AJNR. American journal of neuroradiology, 39(2):273-279, 2018
Journal Title
AJNR. American journal of neuroradiology
ISSN
0195-61081936-959X
Abstract
BACKGROUND AND PURPOSE: Development of noninvasive imaging biomarkers indicating the histology and the gene mutation status of brain metastasis from lung cancer is important. We aimed to investigate diffusion-weighted imaging parameters as predictors of the histology and gene mutations of brain metastasis from lung cancer.
MATERIALS AND METHODS: DWI data for 74 patients with brain metastasis from lung cancer were retrospectively reviewed. The patients were first grouped according to the primary tumor histology (adenocarcinoma, small-cell lung cancer, squamous cell carcinoma), and those with adenocarcinoma were further divided into epidermal growth factor receptor (EFGR) mutation-positive and wild type groups. Sex: age: number, size, and location of brain metastasis: DWI visual scores: the minimum ADC: and the normalized ADC ratio were compared among groups using chi(2) and ANOVA. Multiple logistic regression analysis was performed to determine independent predictors of the EGFR mutation.
RESULTS: The minimum ADC was lower in the small-cell lung cancer group than in the other 2 groups, though the difference was not significant. Furthermore, minimum ADC and the normalized ADC ratio were significantly lower in the EGFR mutation-positive group than in the wild type group (P = .021 and .014, respectively). Multivariate analysis revealed that minimum ADC and the normalized ADC ratio were independently associated with the EGFR mutation status (P = .028 and .021, respectively).
CONCLUSIONS: Our results suggest that DWI parameters (minimum ADC and normalized ADC ratio) for the solid components of brain metastasis from lung cancer are not correlated with their histology, whereas they can predict the EGFR mutation status in brain metastasis from lung adenocarcinoma.
MeSH terms
AgedBrain Neoplasms/diagnostic imaging*Brain Neoplasms/genetics*Brain Neoplasms/secondary*Diffusion Magnetic Resonance Imaging/methods*ErbB Receptors/geneticsFemaleHumansLung Neoplasms/diagnostic imaging*Lung Neoplasms/genetics*Lung Neoplasms/pathology*Magnetic Resonance ImagingMaleMiddle AgedMultivariate AnalysisMutationRetrospective Studies
DOI
10.3174/ajnr.A5516
PMID
29301782
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Radiology
AJOU Authors
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