Post-traumatic syringomyelia (PTS) is relatively rare, but its complications can be serious. In the beginning of the operative treatment (1900-1930), scarring could be reduced to a certain degree. In modern treatment (1980 1990) a shunt implantation showed also little effect in long-term follow-up studies. Influenced by the work of B. Williams, 58 PTS patients underwent surgery to create a pseudomeningomyelocele, an artificial CSF reservoir, performed to normalize the CSF flow. In a 10-year-postoperative follow-up study (minimum observation two years), good results were obtained in more than 70%.