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Clin Lung Cancer. 2013 Nov;14(6):719-25. doi: 10.1016/j.cllc.2013.06.002. Epub 2013 Jul 25.

Suitability of computed tomography-guided biopsy specimens for subtyping and genotyping of non-small-cell lung cancer.

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  • 1Division of Pulmonary Medicine, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan.

Abstract

INTRODUCTION:

Recent advances in the treatment of NSCLC highlight the importance of distinguishing NSCLC subtypes and genotypes. We aimed to determine whether histological specimens obtained from computed tomography (CT)-guided biopsy are suitable for specific subtyping and epidermal growth factor receptor (EGFR) analyses of NSCLC.

PATIENTS AND METHODS:

The clinicohistological data of 332 consecutive patients undergoing 352 CT-guided biopsies for lung lesions between January 2007 and December 2011 were retrospectively analyzed. Additionally, NSCLC specimens were examined for the suitability of EGFR mutational testing.

RESULTS:

Of 209 specimens diagnosed as NSCLC, 197 (94.3%) were specifically subtyped into adenocarcinoma (n = 164; 78.5%), squamous cell carcinoma (n = 27; 12.9%) and other subtypes (n = 6; 2.9%). The rate of NSCLC not otherwise specified (NOS) was 5.7%, and the diagnosis of NSCLC-NOS was significantly associated with the poor differentiation of cancer (adjusted odds ratio, 6.17; 95% confidence interval, 1.62-23.55; P = .008). Of 134 histological tumor specimens submitted for EGFR molecular testing, 132 (98.5%) were suitable for analyses, and 130 of them (98.5%) showed conclusive results, revealing 59.8% (n = 79) with EGFR exon mutation(s). The sensitivity, specificity, and positive and negative predictive values of CT-guided biopsy in patients with malignancy were 92.2%, 100%, 100%, and 74.1%, respectively. Six percent (n = 21) of total lung biopsies led to pneumothorax requiring chest drainage, and no procedure-related fatality was observed.

CONCLUSION:

Small tumor specimens obtained with CT-guided needle lung biopsy are suitable for specific subtyping and EGFR analyses of NSCLC, thus providing critical information for personalized therapy.

Copyright © 2013 Elsevier Inc. All rights reserved.

KEYWORDS:

Epidermal growth factor receptor mutations; Genotyping; Non-small cell lung cancer; Subtyping

[PubMed - indexed for MEDLINE]
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