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- W2784672783 abstract "BACKGROUND Incidence of colorectal cancer is increasing in countries such as Iran. Molecular biomarkers play very important role in the diagnosis, treatment, and prognosis of this cancer. Mutation in the RAS family (including KRAS and NRAS) is one of these important molecular biomarkers, which should be tested before starting treatment with anti-EGRF (Epidermal growth factor) drugs. Objectives: There has been very few reports about the frequency of NRAS mutation from Iran and no study from south of the country. In this article we will describe our experience about the frequency of NRAS mutation in colorectal cancers from the largest referral center in the south of Iran. METHODS During 5 years (2011-2015), we had 52 cases of colorectal cancers with wild type KRAS and BRAF in the hospitals affiliated to Shiraz University of Medical Sciences with enough tissue for molecular studies. NRAS mutation analysis was performed on paraffin embedded formalin fixed tissue of these cases by polymerase chain reaction (PCR)-sequencing method. RESULTS Among these 52 cases of colorectal cancer with wild type KRAS and BRAF, there has been 3 (5.7%) cases with mutant NRAS. One of the mutations has been in codon 12 and two in codon 61. No mutation in codon 13 was found. All the three cases were women with stage IV and well differentiated histomorphology. CONCLUSION Our results showed that frequency of NRAS mutation in colorectal cancer is rare, which is very close to other studies from different geographic areas of the world." @default.
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- W2784672783 date "2018-01-06" @default.
- W2784672783 modified "2023-09-26" @default.
- W2784672783 title "Frequency of NRAS Gene Mutation in Wild Type KRAS and BRAF Colorectal Cancers; a Single Center Study" @default.
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- W2784672783 doi "https://doi.org/10.15171/mejdd.2017.85" @default.
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