ReviewAnti-cancer drugs2025
Transformation from acquired EGFR 19del/C797S to EGFR 19del/T790M in an advanced non-small cell lung cancer patient: a case report and literature review.
Review in Anti-cancer drugs, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Dynamic ecosystems of tumor drug resistance mechanisms: from molecular heterogeneity to systemic interventions.Apoptosis : an international journal on programmed cell death · 2026Review
- Correlation between prognostic nutritional index and oral mucositis in patients with lung adenocarcinoma treated with almonertinib: a multicenter prospective study.Frontiers in nutrition · 2026Article
- Case Report: Short-term disease control with subsequent icotinib therapy in EGFR L858R/C797S, T790M-negative lung adenocarcinoma after osimertinib resistance.Frontiers in oncology · 2026Article
- Durable clinical benefit from gefitinib plus bevacizumab in a non-small cell lung cancer patient with an acquired C797S mutation following osimertinib treatment: a case report and literature review.Frontiers in oncology · 2025Article
Corrections and comments
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Authors and funding
5 authors.
Funding
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Abstract
Third-generation epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) are the first-line treatment of choice for patients with EGFR-mutant advanced non-small cell lung cancer (NSCLC). However, patients treated with these inhibitors eventually develop resistance. One of the most common mechanisms is the emergence of the EGFR C797S mutation. Whether first-generation EGFR inhibitors (e.g. icotinib or gefitinib) can sustainably control EGFR-sensitive mutations/C797S NSCLC following third-generation EGFR inhibitor treatment remains insufficiently reported. Our case report discusses a female patient with advanced lung adenocarcinoma carrying an EGFR exon 19 E746_A750delELREA mutation who received almonertinib as first-line treatment and developed C797S resistance during therapy. The patient was subsequently treated with a double dose of icotinib for 8 months until disease progression occurred, along with the development of an EGFR exon 20 T790M point mutation and TP53 mutation. This case provides clinical evidence suggesting that first-generation EGFR-TKIs may be an effective treatment strategy for patients with acquired EGFR 19del/C797S resistance following EGFR TKI therapy.
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