Emerging a Novel VOPP1-EGFR Fusion Coexistent With T790M as an Acquired Resistance Mechanism to Prior Icotinib and Sensitive to Osimertinib in a Patient With EGFR L858R Lung Adenocarcinoma: A Case Report
[Paper-level Aggregated] PMCID: PMC8727519
Evidence Type(s): Oncogenic, Predictive, Prognostic
Justification: Oncogenic: The presence of the EGFR L858R and T790M variants in the patient's lung adenocarcinoma indicates their role in tumorigenesis and resistance to treatment, supporting their classification as oncogenic. Predictive: The identification of the T790M variant suggests a potential resistance mechanism to first-generation EGFR tyrosine kinase inhibitors, indicating its predictive value for treatment response. Prognostic: The patient's progression-free survival interval of more than 11 months after switching to osimertinib suggests that the presence of the T790M variant may have prognostic implications for treatment outcomes in NSCLC.
Gene→Variant (gene-first): EGFR(1956):L858R EGFR(1956):T790M
Genes: EGFR(1956)
Variants: L858R T790M