Abstract

The Arnold-Chiari -I malformation (ACM) is a congenital anomaly characterized by downward herniation of the cerebellar tonsils into the spinal canal. The anomaly may present in a variety of ways and at times with vague symptoms. Diagnosis is often difficult and therefore delayed. Most commonly, ACM can be misdiagnosed as multiple sclerosis, muscular dystrophy, and other neurodegeneratif disorders. It may present rarely as a psychiatric disorders. To our knowledge, up to now, only two cases have been reported of an anxiety disorders in association whit this anomaly. In this article, a patient who was initially diagnosed as distimic disorder but found out to be ACM after 3 is presented.