The Arnold-Chiari malformation is very rare hindbrain abnormalities 
characterized by herniation of the hindbrain through the foramen magnum. It 
usually does not present until adulthood, and then its symptoms may be varied 
and subtle. Patient 49 years was diagnosed in Foniatrics and Audiology Clinic 
because of tinnitus in left ear lasting 3 months. She underwent audiological 
diagnostic, that did not reveal any abnormalities, except for electrogustometry 
and hyporeflexia of stapedial reflex and labyrinth on the left side. In MRI scan 
we have noticed hindbrain abnormalities characteristic for Chiari type I 
malformation. Treatment consisted of immediate supportive care as needed but 
without surgical decompression, which was found unnecessary.