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Objective. To present a clinical case of surgical correction of a craniovertebral anomaly complicated after 8 years by distal junctional kyphosis, stenosis, antelisthesis of the C5 vertebra and compressive ischemic cervical myelopathy in the C5–C6 segment.
Material and Methods. When treating a 56-year-old patient with multiple anomalies of the craniovertebral region, differentiated surgical technologies were consistently used due to the development of late complications. The sequence and rationale for surgical decision making is described.
Results. Initially, the patient underwent transoral decompression and posterior occipitocervical fixation, and after 8 years - reinstallation of the system with distal extension of the instrumentation zone to the C7 vertebra with indirect posterior decompression of the spinal cord, anterior discectomy with direct decompression and cage fixation at the C5–C6 level. Regression of myelopathic syndrome, correction of orthopedic status and significant improvement in functional status were achieved.
Conclusion. A rare clinical observation demonstrates a combination of basilar invagination with assimilation of the atlas, which has provided rationale for two-stage surgical treatment in one surgical session (1st stage – transoral resection of the dens and 2/3 of the C2 vertebral body with anterior decompression of the spinal cord, and 2nd stage – occipitocervical fixation). The use of extended systems in this case caused the development of a clinically significant syndrome of the distal adjacent level, which required repeated surgical treatment after 8 years.

Objective. To determine incidence rate and risk factors for the development of venous thromboembolism in complicated cervical spine injury.
Material and Methods. The study included 34 patients with acute complicated cervical spine injury. Inclusion criteria were newly diagnosed venous thromboembolic complications, and application of low-frequency piezothromboelastography to study the hemostasis system. All patients received standard drug thromboprophylaxis. Patients were divided into two study groups: Group I included 21 patients
with venous thromboembolic complications, and Group II – 13 patients without thromboembolic complications.
Results. The incidence of venous thromboembolism in the total sample was 61.8 %. Pulmonary artery embolism developed in 4.7 % of cases. In 91,0 % of cases, thrombosis was asymptomatic. The state of the hemostatic system in Group I before the start of thromboprophylaxis was characterized by chronometric hypocoagulation, and structural hypercoagulation with a 2.6-fold increase in the intensity of clot retraction and lysis. In Group II, there was chronometric and structural hypercoagulation with a 14.4-fold increase in the intensity of clot retraction and lysis. The main significant predictors of the development of venous thromboembolism were identified as intestinal paresis (p = 0.004), absence of changes in neurological status (p = 0.012), length of stay in the ICU (p = 0.025), and length of hospital
stay (p = 0.039). The building of a multivariate logistic regression model revealed multiplicative significant predictors of the development of thromboembolism. It has been shown that the presence of intestinal paresis is associated with a 25.07-fold increase in the chances of developing DVT of lower extremities.

Conclusion. Considering the high incidence of venous thromboembolic complications in patients with complicated cervical spine injury, further research is required to study the effectiveness and safety of correction of drug thromboprophylaxis regimens in the form of increasing doses of anticoagulants or the frequency of their administration.

Objective. To analyze literature data on clinical and radiation characteristics of the tethered spinal cord syndrome in spina bifida and to define criteria for indications for surgical treatment.
Material and Methods. A search for prospective cohort clinical studies evaluating the clinical and radiation picture and indications for surgical
correction of the tethered spinal cord syndrome associated with spina bifida, published in 2005–2023 was performed in the Pubmed, EMBASE, eLibrary and the Сochrane Library databases. The literature search was carried out by one researcher. The study was carried out in accordance with the international recommendations for writing systematic reviews and meta-analyses PRISMA. The levels of evidence
for reliability and grades of the strength of recommendations were evaluated according to the ASCO Guidelines.

Results. A total of 394 literature sources were found in the databases. Duplicate materials (n = 81) have been removed. When non-fulltext articles were excluded, only 28 out of 251 remained studies met the inclusion criteria and were analyzed. According to the level of evidence, 18 of them were classified as B level, and 10 – as C level.
Conclusion. The components of the tethered spinal cord syndrome are a dystopic spinal cord cone, a shortened fixed filum terminale, and the presence of a lumbosacral lipoma. At the same time, there are currently no clear criteria for the integral assessment of the clinical and morphofunctional state of patients, and the available scales are not specific. The described MRI criteria are limited by the level of evidence, but despite this, they reflect a high level of consensus among experts, including that on the defining indications for surgical spinal cord
untethering. The lack of clear indications for surgical intervention and the debatability of performing preventive untethering of the spinal cord require further study of the problem with an emphasis on analyzing the criteria for tethered spinal cord syndrome.

Objective. To analyze and compare the results of treatment of lumbar spinal stenosis using minimally invasive unilateral decompression and classical laminectomy.

Material and Methods. The retrospective comparative monocentric study included 68 patients (2 groups of 34 patients each) operated on in 2018–2021 for spinal stenosis in the lumbar spine who met certain eligibility criteria. Patients of one group were operated on using minimally invasive bilateral decompression through a unilateral approach, while patients in the other group were operated on using classical laminectomy. The results of surgical treatment were compared during 24 months by assessing pre- and postoperative indicators of the intensity of pain in the back and lower extremities using a 10-point VAS, and the patient’s functional activity – using the Oswestry index.

Results. A statistically significant clinical effect of surgical treatment was noticed in both groups. At the end of the follow-up period, the results of back pain relief in the minimally invasive surgery group were significantly better (0.3 vs 0.9, respectively), and the improvement in functional activity was comparable to the laminectomy group (8.8 vs 9.8, respectively). A clinical effect of pain relief in the lower extremities was obtained in both groups (up to 1.2 and 1.4, respectively). The length of hospital stay, time to activation, and volume of blood loss were significantly lower in minimally invasive decompression group.

Conclusion. Minimally invasive unilateral decompression of the spinal canal for lumbar spinal stenosis demonstrates a better effect in relieving back pain than classical laminectomy, with no significant difference in relieving pain in the lower extremities. The minimally invasive technique allows patients to rehabilitate as quickly as possible and return to everyday life and work. It has socio-economic advantages compared to classical laminectomy – a shorter period of activation and hospital treatment, and less blood loss.

Objective. To analyze methods contributing to the improvement of clinical and radiological outcomes of surgical stabilization of the lumbar spine in conditions of reduced bone mineral density (BMD).

Material and Methods. A search for publications presenting the results of clinical studies of surgical treatment of patients with degenerative lesions of the lumbar spine and reduced BMD was conducted in English and Russian in the MEDLINE and Russian Science Citation Index (RSCI) databases using key words “osteoporosis”, “osteopenia”, “spinal surgery”, “spinal fusion” and related terms in titles and abstracts with a search depth of 20 years. After applying the inclusion and exclusion criteria, 17 clinical studies were selected for analysis.

Results. Among the large number of techniques and implant-associated factors affecting the success of surgical intervention for degenerative lesions of the lumbar spine and reduced BMD, high-quality clinical studies have proven the effectiveness of expandable screws, spinal fusion with cortical screw placement and cement augmentation with polymethyl methacrylate.

Conclusion. The combination of techniques for cortical pedicle screw placement, cement augmentation and the use of expandable screws makes it possible to achieve results in surgical treatment of patients with degenerative lesions of the lumbar spine with reduced BMD comparable with those in patients with normal BMD. Of particular importance is the preoperative assessment of the regional state of bone tissue, which should be carried out using quantitative CT or MRI studies.

Objective. To analyze the information on spontaneous resorption of lumbar disc herniation.

Material and Methods. A non-systematic review of 37 publications on resorption of disc herniation was conducted. The data on the timing, mechanisms and predictors of regression of lumbar disc herniation were summarized. A clinical case is presented illustrating the resorption of a herniated L4–L5 intervertebral disc over 8 months.

Results. The frequency and timing of resorption of lumbar disc herniation vary depending on the number of patients, follow-up period, the type and nature of the hernial bulging, and other characteristics of patients. The results of meta-analyses indicate that the average period of spontaneous resorption of lumbar disc herniation is more than 6 months. The main theories of spontaneous resorption of lumbar disc herniation are the dehydration theory, the mechanical theory, and mechanisms associated with inflammatory processes and neovascularization. Currently, predictors of disc herniation resorption include the type and size of the hernia, follow-up period, Modic changes, etc. Existing data on the timing, mechanisms and predictors of resorption of lumbar disc herniation are insufficient to improve treatment tactics for this category of patients.

Conclusion. Herniated lumbar intervertebral discs tend to undergo spontaneous regression which, however, is not observed in all patients. The mechanisms of resorption can be different, and the fact of resorption itself can occur in different types of hernia with different frequencies. An analysis of large data sets is necessary to more accurately determine the timing and predictors of resorption of lumbar disc hernias.

Objective. To analyze the features of clinical-radiological manifestations of symptomatic vertebral hemangiomas in children and the possibility of algorithmizing their treatment.

Material and Methods. As part of a monocenter cohort, 24 children aged 4 to 17 years received treatment for symptomatic vertebral hemangiomas. The clinical-radiological manifestations of the tumor and the effectiveness of various methods of invasive treatment were evaluated.

Results. Symptomatic uncomplicated and complicated vertebral hemangiomas, corresponding to stages S2 and S3 of the Enneking classification for benign tumors, occur in children with almost equal frequency. For tumors without extravertebral spread, a closed percutaneous vertebroplasty provides stable relief of complaints. For aggressive hemangiomas with extravertebral, including epidural, spread, various treatment methods are used. An algorithm for choosing therapeutic tactics is proposed.

Conclusion. Surgical treatment of symptomatic vertebral hemangiomas should be carried out using a tactical algorithm that takes into account the stage of the tumor (S2 or S3) and the possibility of performing closed or open vertebroplasty, selective arterial embolization and decompression and stabilization operations on the spine.

The second part of an interdisciplinary expert consensus on tissue banking is presented. An analysis and attempt was made to systematize some of the terms and definitions used by tissue bank specialists in the process of their work and presented in the Federal laws and orders of the Ministry of Health of the Russian Federation regulating medical activities in the field of tissue donation and their clinical use.

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