Can you tell me anything about chiari malformation?

Three types: There are 3 main categories i. Cerebellum is displaced about 5 mm below the level of the foramen magnum ii. There is more than 5 mm diplacement below the level of the foramen magnum. This is usually associated with spina bifida- a defect in the spinal coverings leading to a myelomeningocoele iii. There is cerebellum and brainstem protruding out an opening in the skull.