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Published on: September 30, 2016
IMPACT OF KRAS MUTATIONS IN CLINICAL FEATURES IN COLORECTAL CANCER
Renato Morato Zanatto1, Gianni Santos2, Júnea Caris Oliveira1
1Department of Abdominal and Pelvic Surgery, Hospital Amaral Carvalho, Jaú, SP, Brazil.
KRAS mutations, found in nearly half of colorectal cancer patients, correlate with higher CEA levels and spread to multiple sites. Colon cancer with KRAS mutations indicates poorer survival.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- KRAS mutations are key in colorectal cancer development.
- These mutations predict poor response to EGFR inhibitors.
Purpose of the Study:
- Investigate associations between clinical-pathological features and KRAS mutations.
- Analyze KRAS mutation status in colorectal cancer patients.
Main Methods:
- Retrospective analysis of 69 colorectal cancer patients.
- KRAS exon 2 analyzed using direct sequencing and pyrosequencing.
- Mutation type and diagnosis determined.
Main Results:
- KRAS mutations present in 43.4% of patients.
- Common mutations: G12V, G12D, G13D.
- Mutated group showed higher CEA levels; codon 13 mutation linked to multiple metastatic sites. Primary colon cancer associated with worse survival.
Conclusions:
- KRAS mutations are frequent in colorectal cancer.
- Higher CEA and codon 13 mutation associated with advanced disease.
- Colon cancer with KRAS mutation has poorer prognosis.
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