Higher quality of molecular testing, an unfulfilled priority: Results from external quality assessment for KRAS mutation testing in colorectal cancer.
J Mol Diagn
; 16(3): 371-7, 2014 May.
Article
em En
| MEDLINE
| ID: mdl-24631467
ABSTRACT
Precision medicine is now a key element in clinical oncology. RAS mutational status is a crucial predictor of responsiveness to anti-epidermal growth factor receptor agents in metastatic colorectal cancer. In an effort to guarantee high-quality testing services in molecular pathology, the European Society of Pathology has been organizing an annual KRAS external quality assessment program since 2009. In 2012, 10 formalin-fixed, paraffin-embedded samples, of which 8 from invasive metastatic colorectal cancer tissue and 2 artificial samples of cell line material, were sent to more than 100 laboratories from 26 countries with a request for routine KRAS testing. Both genotyping and clinical reports were assessed independently. Twenty-seven percent of the participants genotyped at least 1 of 10 samples incorrectly. In total, less than 5% of the distributed specimens were genotyped incorrectly. Genotyping errors consisted of false negatives, false positives, and incorrectly genotyped mutations. Twenty percent of the laboratories reported a technical error for one or more samples. A review of the written reports showed that several essential elements were missing, most notably a clinical interpretation of the test result, the method sensitivity, and the use of a reference sequence. External quality assessment serves as a valuable educational tool in assessing and improving molecular testing quality and is an important asset for monitoring quality assurance upon incorporation of new biomarkers in diagnostic services.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Análise Mutacional de DNA
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Neoplasias Colorretais
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Proteínas Proto-Oncogênicas
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Proteínas ras
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Ensaio de Proficiência Laboratorial
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Técnicas de Genotipagem
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article