An elevated type of gastric ulcer scar (EUS) (A) was noted in 8 out of 227 ulcer patients treated with cimetidine. These were compared with 15 patients with EUS (B), not treated with cimetidine and the etiology of the lesion was discussed. The incidence of EUS (3.5%) and the average age of the patients were higher (61 years) in the A group than in the B group. The scar was seen all over the stomach in the A group. The period from detection of gastric ulcer to confirmation of EUS averaged 4 weeks, and there was no difference between the two groups. No difference was seen in the histological findings of elevated lesions either. In the A group, it appears that EUS was induced by rapid tissue regeneration due to the strong anti-ulcer effect of cimetidine in ulcer lesions, since it was noted in the regions where it had previously been considered unlikely to occur.

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