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Radiological Changes After Stereotactic Radiotherapy for Stage I Lung Cancer.
MedLine Citation:
PMID:  21623237     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
INTRODUCTION:: Stereotactic body radiation therapy (SBRT) is entering routine clinical use for selected patients with early-stage non-small cell lung cancer. Post-SBRT radiological changes are commonly seen on follow-up computed tomography (CT) imaging and can cause diagnostic dilemmas. The aim of this study is to describe the incidence, radiological severity, and long-term morphology of these changes. METHODS:: CT scans from patients treated between 2003 and June 2008 were eligible for evaluation if radiological follow-up had been performed at our center for at least 2 years, and there was no definite evidence of local recurrence. Timing, incidence, morphology, and severity of lung changes were determined. RESULTS:: CT scans from 61 patients (68 lesions) with a median follow-up of 2.5 years were evaluated. Within 6 months, 54% of lesions were associated with additional radiological abnormalities, and this figure reached 99% after 36 months. Most changes were scored as mild to moderate, and although the median time to first observation was 17 weeks, 25% appeared ≥1 year post-SBRT. In 47% of lesions, the morphology or severity of changes continued to evolve more than 2 years posttreatment. CONCLUSIONS:: Mild-moderate radiological changes are common after lung SBRT. Some degree of late change is nearly universal, and it often continues to evolve more than 2 years post-SBRT. Clinicians should be aware of these radiological findings, which need to be distinguished from the uncommon cases of local failure post-SBRT.
Authors:
Max Dahele; David Palma; Frank Lagerwaard; Ben Slotman; Suresh Senan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-26
Journal Detail:
Title:  Journal of thoracic oncology : official publication of the International Association for the Study of Lung Cancer     Volume:  -     ISSN:  1556-1380     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101274235     Medline TA:  J Thorac Oncol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands.
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