Leukemia of the meningeal form is a rare disease characterized by damage to the membranes of the brain and nervous system. If earlier this diagnosis sounded unusual and incomprehensible to many unfamiliar people, today it is quite common among oncological diagnoses. Many specialists do not understand why patients seek help with such a “non-standard” lesion? The development of diseases such as leukemia and meningitis is fraught with dire consequences: patients fall into a coma after severe attacks, a significant proportion of patients die, and the rest require additional therapy and rehabilitation. However, even now it is possible to successfully combat this disease. The causes of development, symptoms and treatment methods will be described below.