BLI for the Diagnosis of Precancerous Conditions and Cancerous Lesions
Introduction: At the present, conventional WLE (white light endoscopy) with biopsies according updated Sydney system is still considered the gold-standard for the diagnosis and stratification of gastric preneoplastic conditions. However, due to the high interobserver variability and the scarce correlation between the endoscopic and histopathological report, there is a growing use of virtual chromoendoscopy, which has shown excellent results on the diagnosis of these conditions. Numerous studies demonstrated the utility of NBI (Narrow Band Imaging) for this purpose, however, there is scarce data regarding the efficacy of the FUJIFILM system, Blue Light Imaging (BLI), on this topic, especially in Europe, despite the good results recently reported. Primary aim: to validate the new high-resolution endoscopic technologies with BLI on the diagnosis of gastric preneoplastic conditions. Material and methods: a multicentric cohort study will be performed involving centres from several European countries (Portugal, Spain, Italy, Belgium, Germany). Consecutive patients performing upper gastrointestinal (GI)endoscopy will be evaluated by WLE and BLI. Random biopsies or targeted plus random biopsies will be performed in order to determine de accuracy of BLI system to detect and stage gastric intestinal metaplasia (GIM). Expected results: We anticipate that BLI would enable us to assess the extension of GIM without the need for biopsies. If observed, this would overall improve the upper GI endoscopy accuracy.
Start: March 2021