[The importance of early recognition of impeded cranial migration of the spinal cord].

Impeded cranial migration of the spinal cord is described in five cases which initially were not recognized. The aetiology, symptomatology and differential diagnosis are presented. The clinical manifestations are signaled by skin lesions typical for dysraphic lesions, signs of urinary and rectal incontinence, deformity or weakness of the feet, impaired gait, motor reflex and sensory changes, and occasionally trophic changes. The restriction in cranial migration of the spinal cord can only be proved by myelography. The importance of early neurosurgical intervention to prevent irreversible deterioration of the motor, sensory or urinary system is particularly emphasized. Improvement after surgery can be achieved in at least 30% of the patients who already developed neurological deficits.