Presence of RB1 or Absence of LRP1B Mutation Predicts Poor Overall Survival in Patients with Gastric Neuroendocrine Carcinoma and Mixed Adenoneuroendocrine Carcinoma
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View abstract on PubMed
Summary
This summary is machine-generated.This study analyzed genetic mutations in rare stomach neuroendocrine carcinomas (NECs) and mixed adenoneuroendocrine carcinomas (MANECs). Key gene alterations and survival predictors like LRP1B and RB1 mutations were identified.
Area Of Science
- Oncology
- Genetics
- Gastroenterology
Background
- Gastric neuroendocrine carcinomas (NECs) are rare and aggressive tumors.
- Limited understanding of the genomic landscape of gastric NECs and mixed adenoneuroendocrine carcinomas (MANECs).
Purpose Of The Study
- To evaluate the genomic and clinicopathological characteristics of gastric NECs and MANECs.
- To identify frequently mutated genes and potential survival predictors in these rare gastric tumors.
Main Methods
- Retrospective analysis of next-generation sequencing data from 14 gastric NECs, 3 MANECs, and 1,381 gastric adenocarcinomas (2017-2022).
- Review of clinicopathological parameters and genomic alterations.
Main Results
- Gastric NECs/MANECs frequently showed alterations in TP53, RB1, SMARCA4, RICTOR, APC, EGFR, and BRCA2.
- Specific mutations (AKT3, RB1, SLX4), amplifications (BRCA2, RICTOR), and deletions (RB1) were more common in NECs/MANECs compared to adenocarcinomas.
- LRP1B mutation correlated with longer overall survival (OS), while RB1 mutation and advanced TNM stage were associated with shorter OS.
Conclusions
- Identified frequently mutated genes in gastric NECs and MANECs.
- Highlighted LRP1B and RB1 mutations as potential prognostic biomarkers for survival in gastric NECs and MANECs.
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