DIAGNOSIS OF MINUTE EARLY GASTRIC CANCER USING MAGNIFIED ENDOSCOPY-ESPECCIALLY USING MAGNIFIED-NARROW BAND IMAGING

Abstract

The narrow-band imaging (NBI) is a newly developed device which brings about an information of the microvascular structure of GI mucosa. An aim of this study is to investigate the usefulness of the magnified NBI for more accurate endoscopic diagnosis of the early gastric cancer. The appearances of the magnified NBI were classified as follows ; fine-network, oval, spiral, and irregular patterns. Well-differentiated adenocarcinomas typically showed fine-network pattern. Moderately differentiated adenocarcinomas typically showed oval or spiral pattern. Poorly differentiated adenocarcinomas typically showed irregular pattern. Using these vascular pattern, we will be able to diagnose minute cancer without biopsy. The magnified NBI observation was useful for the pretreatment histological evaluation of the early gastric cancer.