What are the most dangerous brain diseases?

People always assume that every disease of the brain is near fatal or fatal but this is not true. Not to make brain disease look like a mere common cold, I do admit that it does hold a degree of seriousness. Most fatal brain diseases are rare.  For example, the Creutzfeldt-Jakob Disease causes a rare folding of brain cells that inevitably leads to death. This disease is untreatable and is popularly known as mad cow disease. People become infected when they eat meat from an animal infected with a diseased protein called spongiform encephalopathy. Another fatal but rare disease is an infection of the amoeba. the single celled organism enters the body through the nose and immediately destroys the brain tissues. Death is usually within three days. One disease of the brain that is also deadly is Huntington’s Chorea. The difference with Huntington Chorea is that it is inherited. This disease is carried down by the gene of the affected parent. It causes loss of the basic functions of the brain such as movement. Most of these diseases are not curable but there are brain diseases that with proper medication, the symptoms can be minimized for (eg. Alzheimers) which causes dementia and loss of memory.