Abstract
The duodenal ulcer scars are often observed endoscopically at the anterior wall, especially just beyond the pyroric ring. The authors studied whether these endoscopical "scars" were compatibie to pathological scars with the resected specimen or not. At the area diagnosed as endoscopical "scar", tear and irregularity of muscuralis mucosae, thinning of Brunner's gland in submucosal layer, fibrosis in both submucosal and propria muscular layer were microscopically observed and they were diagnosed pathologically as scar. To study the frequency of this type of endoscopical "scar", 154 cases were selected at random from endoscopical gastric mass survey cases. After other doctors diagnosed them as "normal" bulbi, the authors paid special attention to this area, namely, just beyond the pyloric ring. The "scars" existed in 75% of them. It was revealed that scars at this area were existed more frequently than previously thought.
