NDLI: KRAS and BRAF genotyping of synchronous colorectal carcinomas

Content Provider	PubMed Central
Author	Giannini, Riccardo Lupi, Cristiana Loupakis, Fotios Adele, Servadio Chiara, Cremolini Sensi, Elisa Chiarugi, Massimo Antoniotti, Carlotta Basolo, Fulvio Falcone, Alfredo Fontanini, Gabriella
Copyright Year	2014
Abstract	v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS) genotyping is required prior to anti-epidermal growth factor receptor monoclonal antibody therapy administered in cases of metastatic colorectal carcinoma (CRC). Thus, KRAS mutation screening is required for patient management. The present study reported the experience of KRAS/v-raf murine sarcoma viral oncogene homolog B1 (BRAF) mutational screening on synchronous CRC pairs from 26 patients, which were defined as index lesions (ILs) and concurrent lesions (CLs) on the basis of tumor grade and dimension and their respective lymph node and distant metastases. Overall, KRAS mutations were present in 38.4% of patients, whereas BRAF mutations were present at a frequency of 11.5%. The genotyping of paired synchronous carcinomas indicated that 11 patients (42.3%) exhibited discordant KRAS mutational statuses in terms of the presence of a mutation in only one lesion of the pair or of two different mutations harbored by each lesion. BRAF mutations were present in the synchronous tumors of two cases, whereas in two other cases, only the IL or CL harbored mutant BRAF. Overall, the mutational statuses of distant and lymph node metastases confirm the genetic heterogeneity of synchronous primary tumors. These results highlighted the fact that adequate sampling and comprehensive testing, when feasible, is likely to optimize the decision-making process for treatment approaches, even in the relatively rare event of multiple synchronous lesions.
Related Links	http://dx.doi.org/10.3892/ol.2014.1905
Starting Page	1532
File Format	PDF
ISSN	17921074
e-ISSN	17921082
Journal	Oncology Letters
Issue Number	5
Volume Number	7
Language	English
Publisher	D.A. Spandidos
Publisher Date	2014-02-01
Access Restriction	Open
Rights Holder	D.A. Spandidos
Subject Keyword	Cancer Research Oncology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cancer Research Oncology

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