Role of Probe-based Confocal Laser Endomicroscopy Targeted Biopsy in the Molecular Study of Undifferentiated Gastric Cancer

The patients who enrolled the pCLE group will undergo endoscopic biopsy using pCLE. The cancerous lesion is observed using probe-based confocal laser endomicroscopy. The biopsy was done at the most suspicious parts of the cancerous lesion.

The patients who enrolled this group will undergo endoscopic biopsy under standard white light endoscopy