Abstract
Chiari malformation (CM) is one of the most common malformations of central nervous system. It may be seen with syringomyelia, hydrocephalia and associated pathologies. We described an uncommon clinical presentation of CM in this paper. We report a case of 45 years old male patient consulted to our outpatient clinic with claw hand deformity who had misdiagnosed as ulnar entrapment neuropathy and undergone transposition surgery. We performed electroneuromyography (ENMG) to the patient and revealed normal conduction in ulnar nerve. We focused on the other causes of the deformity and found CM type-I with a syrinx cavity. We consulted the patient to neurosurgery clinic of our center for further treatment. CMI is often associated with syringomyelia. Claw hand is oftenly associated with traumatic or tumor related syrinx cavity but association with CMI is very unusual. We recommend the evaluation of such patients more carefully focusig on different causes.
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