[Cancer from an ulcer or ulcerative stomach cancer? (a review of the literature and the authors' own observations)].

On the basis of surveys of literature and the author's own experience of work, ulcerous lesions of the stomach should be regarded at present as a facultative (precancerous) condition rather than obligate precancer. A great many of biopsy specimens need to be taken from the patient's stomach across the lifespan and subjected to morphologic study on a repeated basis before an adequate answer can be given to a question of a possibility of developing cancer from chronic ulcer of the stomach.