Brain cancer is a disease characterized by the presence of malignant (cancerous) cells in the brain tissue. Cancer cells usually impact bodily and cognitive functions, including muscle control, memory, respiration, and others.Tumors made up of cancerous cells are called malignant tumors. Non-cancerous tumors are called benign tumors. Malignant tumors effectively subdue healthy cells, taking their blood, nutrients, and space in the body.Brain cancer, while serious, is quite rare. Studies estimate that the illness accounts for less than 1.5 percent of all new cancer cases. Per the National Cancer Institute, there are approximately 23,770 new cases and 16,050 deaths from brain cancer each year.