Diagnosis of the Gastric Elevated Lesions Using Magnifying Electronic Endoscopy and“Band Enhancement”

Abstract

Magnifying electronic endoscopic examination using Olympus GIF-V10Z, XGIF-200Z and XGIF-200HM was done to assess the mucosal microstructure (gastric pits and finger like processus) of the gastric elevated lesions.“Band enhancement”was also used to get the clear image of the mucosal microstructure. These magnifying endoscopic images were compared with the dissecting microscopic views of the resected specimens and pathological examination was performed. The results obtained were as follows.
1) Hyperplastic foveolar polyp had reddish and enlarged finger like processus which reflected congestion and edema of the interstitium.
2) Fundic polyp had regularly distributed, round gastric pits.
3) Gastric adenoma had whitish, regularly distributed gastric pits and finger like processus.
4) Protruded early gastric cancer had irregularly shaped gastric pits and finger like processus.
These results indicated that mucosal observation with the magnifying electronic endoscopy and“band enhancement”leaded to more accurate diagnosis of the gastric elevated lesions.