Thiazolopyrimidinium systems with a quaternized nitrogen atom are attracting increasing attention in the development of new anticancer drugs. Their unique chemical structure and potential biological properties make them promising candidates for the development of effective drugs. In recent years, researches have shown that these compounds have significant activity against various types of tumors due to their ability to interact with cellular targets, disrupting processes critical for the survival and proliferation of tumor cells. This review examines the current state of researches on thiazolopyrimidines, including synthesis, mechanisms of action, and evaluation of their antitumor potential, with an emphasis on the importance of the quaternized nitrogen atom in their biological activity.

The review examines the current state of free radical oxidation processes in clinical medicine. Based on many years of our research and analysis of the literature, we consider the most promising assessment of the activity of glutathione reductase and the level of glutathione reduced in erythrocytes, as a characteristic of the thiol-disulfide redox system of glutathione, not only to indicate oxidative stress, but also a possible prognostic marker of “free radical diseases”.

Introduction. Vacuum-assisted biopsy (VAB) of the tumor bed in the breast has shown promising results as a minimally invasive method for determining pCR. A significant disadvantage of VAB is the fragmentation of the obtained material and the lack of methods for determining generally accepted predictive and prognostic factors.

The objective was to provide a description of the accumulated experience of histological examination of specimens obtained using VAB in patients with breast cancer after neoadjuvant systemic therapy.

Methods and materials. A single-center, prospective, non-randomized study included patients with unifocal breast cancer (cT1–2N0–1M0). Patients who achieved a complete clinical response (cCR) underwent VAB. Based on the results of histological examination, patients without signs of residual tumor (pCR, ypT0N0) did not undergo further surgical intervention. When residual tumor cells (ypTisN0-1, ypT1-2N0-1) were detected, standard breast surgery was performed.

Results. 35 patients with a mean age of 48.3 (31–67) years were included in the analysis. The examination of VAB samples showed that 11 (31.4 %) patients had a residual tumor, and in 24 (68.6 %) patients, no tumor cells were detected (ypT0N0). According to the Miller-Payne system, 28 patients had a complete pathological response, which corresponds to Miller-Payne=5 and pathological stage ypT0/ypTis (24 patients ypT0N0, 3 patients ypTisN0 and 1 patient ypT0N1). In 3 patients with residual invasive tumor, the tumor response according to the Miller-Payne scale corresponded to grade 3. There was a statistically significant correlation between presence of residual tumor cells in the outer counter after VAB and presence of residual tumor cells in the postoperative histology after standard surgery (Х² p=0.01, Fisher exact test p=0.048). In addition, there was a statistically significant correlation between hormone receptor status and the degree of tumor response when evaluated using the Pearson criterion (p=0.046). We observed the smallest discordance between the data of the control examination and the data of the histological conclusion when interpreting the results of mammolymphoscintigraphy (25 %) and if 3 out of 3 studies described a complete clinical regression (16.7%).

Conclusions. The method used to evaluate histological material allows to obtain predictive and prognostic information necessary to clarify further treatment tactics in accordance with modern standards. It is necessary to conduct more largescale studies in this area to answer the question if this method can be used in routine clinical practice.

Introduction. To date, data have been accumulated indicating the high effectiveness of the HDIT-AHSCT and the possibility of preserving and improving the quality of life of patients after its application.

The objective was to analyze the dynamics of quality of life using standardized assessment tools in patients with MS for 3 years after the use of HDIT-AHSCT, who participated in the program of clinical approbation of the method.

Methods and materials. The single-center observational study included 21 patients (10 women, 11 men) with a reliable diagnosis of MS, who underwent HDIT-AHSCT at the Pavlov First Saint Petersburg State Medical Universityin accordance with the protocol of clinical approbation. Distribution by type of MS course: remitting (RMS) 16 (76.2 %), secondary progressive (SPMS) 4 (19 %), primary progressive (PPMS) 1 patient (4.8 %). The assessment of quality of life (SF-36, FAMS, CSP-MS42, HADS) and severity of disability (EDSS) in all patients was performed before, 12 and 36 months after HDIT-AHSCT.

Results. Three years after the HDIT-AHSCT, a significant decrease in weakness, feelings of constant fatigue and rapid fatigue during exertion was recorded. The level of anxiety decreased in more than 50 % of patients. A direct relationship between the dynamics of clinical characteristics and the data of the scales of the SF-36 questionnaire was revealed; at the same time, after 36 months, an improvement in all parameters of the scale was noted.

Conclusion. The assessment of the indicators of the quality of life questionnaires allows us to confirm the effectiveness and significance of therapy not only from the point of view of objective clinical and radiation parameters necessary for the evidence base of the treatment method, but also from the patient’s position, which in conditions of a chronic progressive process is an integral factor for the appointment of therapeutic intervention.

Introduction. This article raises the issue of planning the timing and method of operative delivery in pregnant women with placenta accreta spectrum. Placenta accreta spectrum is one of the most formidable complications of pregnancy, the delivery of pregnant women with this pathology is accompanied by massive blood loss, and programmed late premature birth leads to an increase in perinatal morbidity.

The objective was to evaluate the possibility of prolonging pregnancy to full term in patients with pathology of placenta accreta spectrum.

Methods and materials. 94 histories of pregnant women with placenta accreta spectrum, delivered from 2017 to 2023, were analyzed. All patients were divided into 4 groups according to the topography of placenta accreta. According to the assessment of perinatal outcomes, pregnant women were divided into 2 groups: group 1 – pregnant women who delivered at 34–36 weeks of pregnancy (n=82; 87 %); group 2 – patients operated on from 37 to 39 weeks of gestation (n=12; 13 %). The statistical analysis was performed using the program StatTech v. 4.2.7.

Results. Among pregnant women whose delivery ended with hysterectomy (n=32, 100 %), the largest proportion of patients had placenta accreta in the area of the parametrium and cervix (n=12, 43.75 %). The average score of newborns in group 1 was 7 points on the Apgar scale at 1 minute after extraction and 8 points on the Apgar scale at 5 minutes; in group

2, the average score on the Apgar scale was 8 and 8 points at 1 and 5 minutes.

Conclusion. If placenta accreta is suspected and involves the cervix, parametrium, and lower part of the posterior wall of the bladder, a hysterectomy is most likely to be performed. For such pregnant women, it is possible to shift the timing of surgical intervention to 37/38 weeks of gestation in order to improve neonatal outcomes.

Introduction. Numerous data on increased risk of stroke in people with multiple sclerosis (MS) needs clarification in view of shared pathogenesis and immunotherapy risks.

The objective was to assess risk factors, prevalence and misdiagnosis of stroke in MS patients for future prevention optimization.

Methods and materials. Cross-sectional retrospective study of risk factors, prevalence and misdiagnosis of stroke in cohort of 563 MS patients aged 40 years and older.

Results. The cohort under study was representative in terms of gender ratio and MS variants. Stroke rate established as 1.78 % in MS type and gender representative cohort. Ischemic stroke was in 9/10 cases and ischemic venous stroke with hemorrhage in 1/10. Stroke misdiagnosis at MS first presentation estimated as 1.95 %. Stroke risk factors seems to be less prevalent in MS cohort compared to general population, with ischemic heart disease (OR=23.9) and arterial hypertension (OR=7.2) as most significant risk indicators.

Conclusion. Stroke prevalence in MS patients may be lower than that in general population. Low rate of arterial hypertension (25.4 %), ischemic heart disease (3.4 %), smoking (10.7 %), diabetes mellitus (3.2 %), and obesity (9.1 %) may influence stroke low rate in MS. Arterial hypertension and ischemic heart disease are the most significant stroke risk factors in MS.

The objective was to demonstrate a clinical case of an adult patient with Olier’s disease (enchondromatosis), severe hand deformity, and its treatment in orthopedic department. Patient K., 71 years old, was treated with severe deformation of the left hand due to Ollier’s disease in Ya. L. Tsiv’yan Novosibirsk Research Institute of Traumatology and Orthopedics in 2017. The patient underwent a one-stage multi-stage surgical intervention with removal of the endochondromas of the 1st, 2nd, 4th and 5th fingers, bone and tendon grafting of the defects.

In 5 years after surgery, patient notes a high degree of satisfaction with the treatment. At the control visit, the preservation of the intraoperatively achieved result was established without signs of recurrence of the process or signs of malignancy. The achieved result led to the improvement of motor skills, restored a number of social self-service functions.

Due to the high risks of recurrence and malignancy of the process, patients with Olier’s disease require close monitoring by clinicians. Surgical treatment of benign forms of the disease involves the implementation of an organ-preserving intervention with the reconstruction of bone and tendon ligament defects. The main goals of the intervention in this case were a removing of the pathological substrate and the improvement of hand function.