Fig. 1

Changes in endoscopic findings over 3 years. a One-year exposure to lanthanum: The mucosa was rough compatible with atrophic gastritis but a little white granular mucosa was observed in the lesser curvature of the gastric body. b Two-year exposure to lanthanum: The white granular mucosa was clearly observed in lesser curvature and the multiple erosions suggesting the presence of inflammation appeared in the greater curvature of the lower gastric body. c Three-year exposure to lanthanum: The white granular mucosa spread widely and erosions also remained. d Four-year exposure to lanthanum: Endoscopic alterations observed at the third examination were further widespread, and more conspicuous