Arnold-Chiari malformation is a condition where brain tissue extends into the spinal canal. This occurs when the cerebellum, the part of the brain that controls balance, is pushed down through the opening at the base of the skull. It can lead to various symptoms, including headaches, neck pain, and balance issues. The condition is often diagnosed through imaging tests like MRI. Treatment may involve monitoring symptoms or, in more severe cases, surgery to relieve pressure on the brain and spinal cord. Early diagnosis and management can help improve quality of life for those affected.