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Rare, Yet Targetable: New Perspectives on Ampullary Carcinomas
James Gutmans1, Alex Friedlaender2, Hiba Mechahougui1
1Oncology Department, Geneva University Hospital (HUG), 1205 Geneva, Switzerland.
International Journal of Molecular Sciences
|February 13, 2026
Summary
Ampullary carcinoma (AC) care should prioritize lineage at diagnosis and mutations at progression. This approach guides treatment for this rare gastrointestinal cancer, improving patient outcomes.
Area of Science:
- Gastroenterology
- Oncology
- Genetics
Background:
- Ampullary carcinoma (AC) presents diagnostic and therapeutic challenges due to its dual intestinal and pancreatobiliary differentiation.
- Current management strategies require refinement to incorporate advanced molecular insights.
Purpose of the Study:
- To review current epidemiology, pathology, and multi-omic data for ampullary carcinoma.
- To propose a pragmatic, precision-driven care pathway for AC management.
Main Methods:
- Synthesis of epidemiological, pathological, and multi-omic data.
- Analysis of next-generation sequencing (NGS) findings, including targeted panels and comprehensive profiling.
- Evaluation of liquid biopsy utility (ctDNA, bile-derived DNA).
Main Results:
- Histology (intestinal vs. pancreatobiliary) dictates initial treatment strategy.
- NGS identifies actionable alterations (ERBB2/HER2, MSI/dMMR, BRAF V600E, NTRK/RET fusions, KRAS mutations).
- A rapid-core panel is recommended for initial high-impact targets, with comprehensive profiling at progression.
Conclusions:
- A 'lineage-first, mutation-fast' paradigm optimizes precision care for AC.
- Liquid biopsies can complement tissue analysis for lineage determination.
- Future research should focus on AC-specific trials and ctDNA-informed endpoints.
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