ACM 4 is now considered a different, but related condition. For example, Natalie has ACM1 15mm. Chiari is often misdiagnosed since it can only be diagnosed with the use of an MRI scan and the symptoms are so wide and varied. Many doctors have never even heard of chiari. To find out more about MRI scans then visit the MRI page .
Symptoms are wide and varied, but head and neck pain, fatigue and dizziness are the most common.
To read a very comprehensive list, please click here . The surgery requires the removal of bone from the base of the skull and from the upper vertebrae. You can read more about this, as well as seeing diagrams on the Surgery Page . Drugs are often used to treat the symptoms themselves, but that is only a short-term measure. Many people with chiari live with only minimal symptoms.