Review article: pre-neoplastic states of the gastric mucosa--a practical approach for the perplexed clinician.

The sequence leading to gastric cancer can be schematically reduced to Helicobacter pylori infection-chronic gastritis-atrophy-intestinal metaplasia-dysplasia-neoplasia. Although clinicians have not yet developed a uniform approach to the treatment of gastritis (when should H. pylori infection be treated?), the entity itself is not the subject of controversy. All other lesions are still the focus of debate. There are no guidelines for the management of patients with intestinal metaplasia; pathologists are still searching for universal diagnostic criteria for atrophic gastritis; dysplasia and early neoplasia have elicited scientific diatribes between Japanese and Western pathologists. Amidst such controversies and in the absence of guidelines to regulate the management of gastric lesions, the responsibility to provide sensible clinical advice is often bestowed upon pathologists. This review discusses whether pathologists have access to sufficient evidence to provide the requested advice, and whether a consensus on the management of gastric "pre-neoplastic" states is within reach. We conclude that, although many sensible and useful definitions, criteria and classifications are being generated, the final decision on how to manage the individual patient with gastric lesions will continue to be based on the communication between pathologist and clinician.