title: [Some problems concerning malignant change of chronic peptic ulcer (author's transl)].
mesh_terms: D000328:Adult; D000368:Aged; D002471:Cell Transformation, Neoplastic; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000209:etiology* / Q000473:pathology; D013276:Stomach Ulcer / Q000150:complications* / Q000473:pathology