Indian Journal of Cancer
Home  ICS  Feedback Subscribe Top cited articles Login 
Users Online :1088
Small font sizeDefault font sizeIncrease font size
Navigate Here
 »   Next article
 »   Previous article
 »   Table of Contents

Resource Links
 »   Similar in PUBMED
 »  Search Pubmed for
 »  Search in Google Scholar for
 »Related articles
 »   Citation Manager
 »   Access Statistics
 »   Reader Comments
 »   Email Alert *
 »   Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded143    
    Comments [Add]    
    Cited by others 2    

Recommend this journal


Year : 2017  |  Volume : 54  |  Issue : 1  |  Page : 280-284

Repeat biopsy in epidermal growth factor receptor mutation-positive nonsmall cell lung cancer: Feasibility, limitations, and clinical utility in Indian patients

1 Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
2 Department of Medical Oncology, Tata Memorial Hospital, Molecular Laboratory, Mumbai, Maharashtra, India
3 Department of Pathology, Tata Memorial Hospital, Mumbai, Maharashtra, India
4 Department of Radiology, Tata Memorial Hospital, Mumbai, Maharashtra, India

Correspondence Address:
Dr. K Prabhash
Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijc.IJC_215_17

Rights and Permissions

INTRODUCTION: The feasibility and success rate of repeat biopsy for epidermal growth factor receptor (EGFR) mutation-positive lung cancers that have progressed on tyrosine kinase inhibitors (TKIs) are varied and merits further assessment. MATERIALS AND METHODS: EGFR mutation-positive lung cancers were offered repeat biopsy upon progression on TKIs. Two groups of patients, first one on a clinical trial and second one from a database, were included for analysis. The feasibility to perform a repeat biopsy was analyzed in the first group. Success rate of biopsy and tissue adequacy for molecular testing was analyzed in both groups. Descriptive statistics were used for analyzing the demography, EGFR mutation type, tissue adequacy, and molecular profile at repeat biopsy. Kolmogorov–Smirnov test was used to assess normality of data. Two sample t-tests were used for comparison of proportions. RESULTS: The feasibility of undergoing repeat biopsy was 77% (95% confidence interval [CI] of 69.4%–83.5%) in the first group (114/148 patients). Feasibility was not analyzed in the second group of patients. Out of 196 patients who underwent a repeat biopsy, 154 patients (78.6%; 95% CI: 72.2%–84.1%) had tumor tissue adequate for performing molecular testing. 27/196 (13.8%) patients did not have any evidence of malignancy on repeat biopsy whereas 15/196 (7.6%) patients had scanty tissue on repeat biopsy prohibiting molecular testing. Six patients (3.06%; 95% CI: 1.1%–6.5%) had small cell transformation. T790M mutation was detected in 12 out of the 42 patients (28.6%; 95% CI: 15.7–44.6) in whom EGFR testing was performed on repeat biopsy specimen. CONCLUSION: Repeat biopsy was able to provide adequate tissue acquisition in only two-thirds of the patients. Liquid biopsy represents an important tool to bridge this gap.


Print this article     Email this article

  Site Map | What's new | Copyright and Disclaimer
  Online since 1st April '07
  © 2007 - Indian Journal of Cancer | Published by Wolters Kluwer - Medknow