Occurence of mutation on KRAS, NRAS and BRAF in patients with colorectal cancer

Authors

DOI:

https://doi.org/10.21527/2176-7114.2024.49.14392

Keywords:

Colorectal neoplasia, Ras gene, Colon adenocarcinoma, Statistical interpretation of data

Abstract

Objective: To investigate the profile of mutations in the KRAS, NRAS and BRAF genes among patients with colorectal cancer in the mid-west of the state of Santa Catarina. Method: This is a cross-sectional study that included all the medical records of patients diagnosed with stage IV colorectal cancer in a pathology laboratory between 2016 and 2021. The presence or absence of mutations in the KRAS, NRAS and BRAF genes were analyzed according to patient characteristics and stratified by gender. Results: The sample consisted of 244 patients in whom mutations were detected in 58.2%. Of these, 52.3% had a KRAS mutation, 8.1% in the NRAS gene, and 17.1% in BRAF. In males, KRAS mutations were observed in 48.5%, followed by NRAS and BRAF mutations, both with 8.2%. In females, 58.3% were KRAS mutations, 30.0% in the BRAF gene and 7.9% NRAS. The risk of KRAS mutations was higher among women aged 51-60 (PR=1.30; 95%CI:1.07-1.58), the risk of NRAS mutations was lower in men when left-sided (PR=0.94; 95%CI:0.90-0.98). BRAF mutations showed a lower risk among older women (p<0.001). Conclusion: There was a higher prevalence of mutations in the KRAS gene in both sexes. The mutations varied according to the sex and age of the patient, and the laterality of the tumor. Furthermore, BRAF gene mutations were more prevalent in women with right-sided tumors, while NRAS gene mutations were less prevalent in men with left-sided tumors.

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Published

2024-09-26

How to Cite

Sartori, A. J. P., Zanella, V., Lorencette, N. A., Marmitt, L. P., Xavier, P. B., & Debiasi, M. M. (2024). Occurence of mutation on KRAS, NRAS and BRAF in patients with colorectal cancer. Context and Health Journal, 24(49), e14392. https://doi.org/10.21527/2176-7114.2024.49.14392

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Section

ORIGINAL ARTICLE