SummaryThe authors report two cases of gastric neoplasm in young adults characterized by the lack of digestive symptoms as well as by the importance of simultaneous neurologic manifestations.In one of their patients, the neurologic manifestations depended obviously on mechanical factors. In the other patient, they likely had their origin in food- deficiencies, the action of which was probably reinforced by a synergic tabagic or neoplasic intoxication.