胃穹窿部にみられた扁平上皮化生の1 例

A Japanese man underwent resection of the lower esophagus and gastric cardia, followed by jejunal interposition reconstruction for refractory reflux esophagitis and annual esophagogastroduodenoscopy for follow-up. Esophagogastroduodenoscopy performed at 87 years of age revealed a white area (approximately 10 mm in diameter) with a clear boundary in the gastric fornix. Narrow-band imaging showed a lesion that was white-green in color without a glandular structure on the surface. We diagnosed squamous metaplasia of the stomach based on biopsy findings. Annual esophagogastroduodenoscopy showed a slight increase in the area of squamous metaplasia over the course of follow-up. Evaluation performed at 92 years of age revealed a lesion with a maplike morphology. Gastric squamous metaplasia rarely occurs discontinuously from the esophageal mucosa; however, prompt endoscopic diagnosis is possible based on the characteristic morphology of this lesion.