P-359 A novel concomitant NRAS and BRAF mutation in metastatic colorectal cancer
نویسندگان
چکیده
Target therapy in metastatic colorectal cancer needs the determination of KRAS, NRAS, and BRAF mutation status to identify patients resistant anti-EGFR treatment. RASgenes (KRAS+NRAS) are mutated 40-50% 5-10%; presence a double RAS is very rare phenomenon, which why mutations considered exclusive each other. Herein, we describe novel concomitant NRAS/BRAF series patients. A 800 carcinomas fixed paraffin blocks were screened for RAS/BRAF by RT-PCR Idylla™ automated system. All KRASmutation with KRAS Mutation Test, then only wild type NRAS-BRAF Test. Our was characterized 49.6% KRASmutations, 3.8% 3.7% mutationsintheBRAF gene. One patient identified inthe NRAS genes: G12C V600E/D BRAF. This had an immediate liver metastasis from moderately differentiated adenocarcinoma left colon; MSI immunohistochemistry analysis revealed competent mismatch repair proteins. The given folforinox + avastin during 3 months, Avastin+Xeloda as maintenance Fortunately, objective response chemotherapy stabilization one-year follow-up. question is: “Are really other”? It seems difficult answer: even if it’s event, it important search mutatedin specific
منابع مشابه
KRAS, NRAS and BRAF Mutation Analysis in Metastatic Colorectal Cancer
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متن کاملKRAS and BRAF Mutation Analysis in Metastatic Colorectal Cancer
The RAS-RAF-MAP kinase pathway is activated in the EGFR cascade. RAS proteins are G-proteins that cycle between active (RAS-GTP) and inactive (RAS-GDP) forms, in response to stimulation from a cell surface receptor such as EGFR, and act as a binary switch between the cell surface EGFR and downstream signaling pathways. The KRAS gene can harbor oncogenic mutations that result in a constitutively...
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Neuroendocrine differentiation of tumor tissue has been recognized as an important prerequisite for new targeted therapies. To evaluate the suitability of colorectal cancer (CRC) tissue for these treatment approaches and to find a possible link to pretherapeutic conditions of other targeted strategies, we compared neuroendocrine differentiation and KRAS/NRAS/BRAF/PIK3CA/TP53 mutational status i...
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ژورنال
عنوان ژورنال: Annals of Oncology
سال: 2023
ISSN: ['0923-7534', '1569-8041']
DOI: https://doi.org/10.1016/j.annonc.2023.04.415