Five cases of inflammatory or fibrous lesions of stomach wall which had resulted in a swelling of the wall, and clinically arose a suspicion for malignancy, had been reviewed and analyzed again, and the following conclusions are obtained. 1) Most patients are male(4/5), average age is 30 years. 2) Clinically recognized pyloric stenosis are found in 2 cases out of five. One of the two had a two years' history indicating a mild stenosis. 3) There are 3 cases of eosinophilc granuloma, one case of plasma cell granuloma and one case of fibroid polyp. One of the three eosinophilia(10%) in peripheral blood, and in the gastric lesion there was an Anisakis larva(partial gastrectomy was done five days after the onset of the disease). 4) Length of the clinical history were each 5 days, 3 months, 6 months, 6 months, and 2 years. The latter case had a Fibroid polyp in the antrum. 5) Fibroid polyp showed an ucler and a sessile polyp at the mucosal surface of the lesion. 6) Basic pathologic change is an inflammation, for this reason, majority of this lesion may have an ability for natural healing, esp. if the lesion is small in size. Scar tissue which these lesions may leave behind, will accompany and ucler or polypoid lesions later. Also, they may provide a chance to produce a so-called ucler-cancer or scar-cancer at the vicinity of the scar of the stomach.