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Updated: Apr 17, 2026

Comparative Lesions Analysis Through a Targeted Sequencing Approach
Published on: November 5, 2019
Direct correlation between double K-RAS mutation and mucinous carcinoma. A case report
Luca Pacini1, Daniela Bastianelli, Donatella Ponti
1*Departimento di Biotecnologie e Scienze Medico-Chirurgiche, Universita' di Roma "La Sapienza" Latina 04100, Italy †Istituto Chirurgico Ortopedico Traumatologico, Latina 04100, Italy ‡Dipartimento di Medicina Molecolare, Università di Roma "La Sapienza", Roma 00161, Italy.
Abstract:
Mutations at the K-RAS locus in colon cancer cells are frequently associated with lack of responsiveness to therapy with EGFR inhibitors, as a consequence of the activation of Ras-dependent intracellular signals. Here we report a colon cancer case carrying a novel combination of K-RAS mutations involving codon 13 (Gly to Asp) and codon 19 (Leu to Phe), on separate alleles. The double mutation was restricted to tumor cells bearing a mucinous-like phenotype.
Insights
Colon cancer with a novel double K-RAS mutation (codons 13 and 19) showed resistance to EGFR inhibitor therapy. This specific mutation pattern was found in mucinous-like tumor cells.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- K-RAS mutations in colon cancer often predict resistance to EGFR inhibitor therapies.
- This resistance is linked to the activation of Ras-dependent intracellular signaling pathways.
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