The purpose of the study is to establish the frequency of individual anatomical variants, their clinical and neurological manifestations; to evaluate the effectiveness of complex treatment of children with fixed spinal cord syndrome with osteoneural abnormalities of the spine and spinal cord. The work is based on the analysis of the diagnosis and treatment results of 321 patients: 156 (48.6%) boys and 165 (51.4%) girls aged one day to 18 years with latent spinal dysraphism of various forms in combination with other types of spinal malformations. According to the results of studies among patients with Spina bifida aperta, 106 (48.4%) out of 219 patients and out of 102 patients with Spina bifida occulta, 7 (6.9%) had a "fixed spinal cord". The most common causes of SPSM are latent spinal dysraphism of congenital genesis (lipomyelocele, diastomatomyelia, syringomyelia, hydromyelia) and the phenomena of the syndrome of secondary fixation of the spinal cord that occur after surgery.