[Dysontogenetic tumors of the spinal canal. Clinical aspects and long-term follow-up].

20 patients (9 women, 11 men) were operated on because of dysontogenetic tumour in the spinal canal. The average age at the time of operation being 23 years. 9 patients already showed an incomplete transverse lesion with a mean duration of the disease being 51 months. After the operation 15 patients showed an improvement. 12 patients became again fit to work. Two patients are in need of care. Within a after-observation period of three years one patient died.