Precancerous lesions of the stomach.
D002277:Carcinoma / Q000209:etiology*; D002908:Chronic Disease; D005756:Gastritis / Q000473:pathology; D006801:Humans; D011127:Polyps / Q000473:pathology; D011230:Precancerous Conditions / Q000473:pathology*; D013274:Stomach Neoplasms / Q000209:etiology*; D013276:Stomach Ulcer / Q000473:pathology