[A case of congenital fissure of C2 and C3 arches with compression of cervical spinal cord].

A 41-years old male patient is reported who had spastic paresis of all extremities, and evidence of peripheral motor neuron damage. He had been treated with steroids for 10 years after erroneous diagnosis of multiple sclerosis. The final diagnosis was a congenital fissure of C2 and C3 arches with spinal cord compression in cervical part. After operation some improvement of the neurological status was obtained.