The incidence of cerebral tumors among mentally ill patients was 5.3 per 10,000. In a verified series of brain diseases (131 observations) alcoholism was revealed in 40 cases, which either modified the clinical picture of the disease or provoked a number of mental disorders, such as focal epileptic seizures, Korsakoff, or "frontal" syndromes. Alcohol abuse was regarded as a sign of cerebral tumor in a some patients. Reducing the central nervous system compensation abilities, alcohol promoted the malignant development of species of cerebral tumors causing skyrocketing rapid course.