PD-L1-positive cases showed a trend towards a higher prevalence of EBER positivity (6.7% vs 3.0%), MMRd tumours (31.1% vs 22.4%) and CLDN18 high expression (38.8% vs 29.7%).
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Claudin-18 expression in oesophagogastric adenocarcinomas: a tissue microarray study of 523 molecularly profiled cases.
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