CLDN18 and gastroesophageal junction adenocarcinoma: In the randomized, double-blind, phase 3 GLOW trial, capecitabine and oxaliplatin combined with zolbetuximab, a monoclonal antibody that targets CLDN18.2, significantly improved progression-free survival and overall survival in patients with CLDN18.2-positive, HER2-negative, untreated, locally advanced unresectable or metastatic gastric or gastroesophageal junction adenocarcinoma.