SEP 10, 2026 · REVIEW
Intra- and intertumoral discordance of Claudin-18.2: a systematic review and meta-analysis
ESMO Gastrointestinal Oncology
Rigorous meta-analysis of 25 studies with adequate pooled sample sizes quantifies clinically meaningful spatial heterogeneity in Claudin-18.2 expression, with clear implications for specimen selection in targeted therapy decisions.
Reported
Intratumoral discordance rate (po…35.8%
Intratumoral discordance 95% CI20.5–54.7%
Intratumoral I²94.3%