Objective. To analyze early results of surgical treatment in patients with lumbar spinal stenosis using minimally invasive techniques for reconstruction of the spinal canal and fixation of the spine. Material and Methods. A total of 168 patients were treated with minimally invasive unilateral microsurgical decompression for spinal stenosis at the lumbar level. Results. The average length of post-operative inpatient care was 5.8 ± 2.8 days. When assessing the pain intensity in the legs and lumbar spine, as well as in daily activity, positive dynamics was noted after 1 and 6 months. Of the installed 732 screws, 18 (2.4 %) screws were displaced into the spinal canal by less than 2 mm and 4 (0.5 %)-by less than 4 mm. Signs of persistent subcompensated spinal stenosis at the operated level were detected in 5 (2.9 %) patients. The average intraoperative blood loss was 121.1 ± 22.0 ml. All patients were activated at the first day after surgery. Conclusion. Minimally invasive unilateral decompression, if necessary in combination with correction and fixation with percutaneous pedicle screw system and TLIF, eliminates factors causing compression of neural structures, reduces intraoperative blood loss, allows early activation of patients and shortens the length of hospital stay.

A clinical case of surgical treatment of a female patient with posttraumatic syringomyelia which led to tetraparesis and dissociated sensory loss in the trunk and upper and lower limbs is presented. Clinical manifestations of these spinal cord changes occurred 21 years after complicated fracture of the L1 vertebra associated with complex posttraumatic spinal deformity. Multistage surgical intervention made it possible to restore liquorodynamics, perform the necessary correction of severe kyphotic deformity of the spine, and reduce the risk of torso imbalance. As a result, the syrinx practically disappeared at all levels of the study.