Diagnostic group classifications of gastric neoplasms by endoscopic resection criteria before and after treatment: real-world experience.

Background and study aims There are often discrepancies between the pretreatment evaluation of gastric neoplasms by endoscopy with biopsy and the final diagnosis of resected specimen in terms of pathology and depth of invasion. We evaluated the spectrum of discrepancies between pretreatment and posttreatment diagnosis which may deliver significant differences on clinical practice.