The purpose of the study was to evaluate the possibilities of MRI in determining the stage of hemorrhagic stroke (HS) depending on structural and perifocal changes in children.Materials and methods. The study included 46 patients (including 19 boys and 27 girls) aged from the 29th day of life to 18 years, with a clinical picture of cerebrovascular accident and the presence of HS in the brain substance (BS) during an MRI study. For statistical analysis, patients were divided into two groups: group 1 – patients examined in the first 48 hours from the onset of neurological symptoms (21 people), group 2 – after 48 hours (26 people). Comparison in two groups was carried out according to MR signs: the presence of perifocal cytotoxic edema, the presence of perifocal hemorrhagic impregnation, the presence of a cytoplasmic rim. Intergroup comparisons on a qualitative basis were carried out using Fisher's exact test.Results. As a result of the study, differential diagnostic criteria for the stages of HS in children were determined by analyzing the MRI semiotics of hematoma in combination with the symptom complex of perifocal changes (CPC) in the form of perifocal cytotoxic edema, perifocal hemorrhagic impregnation and cytoplasmic rim. Statistically significant differences in the frequency of occurrence of signs of perifocal cytotoxic edema and perifocal hemorrhagic impregnation in the groups were found. The presence of perifocal cytotoxic edema was statistically significant (p = 0.027) more common in group 1 (47% (n = 10), 95% CI 26–69) than in group 2 (16% (n = 4), 95% CI 5–36). The presence of perifocal hemorrhagic soaking was statistically significantly (p = 0.003) more common in group 1 (81% (n = 17), 95% CI 57–93) than in group 2 (36% (n = 9), 95% CI 18–57). In addition, a statistically significant (p = 0.005) difference was found in the incidence of CPC, which was observed in group 1 (28% (n = 6), CI 12–52) and was not observed in group 2 (0%, (n = 0), 95% CI 0–17).Conclusions. The use of T2, T1, FLAIR, SWI and DWI modes (b = 1000) in combination with ADC in the protocol of MRI examination of children is mandatory, and only a comparison of the characteristics of the MR signal from a hematoma in combination with an analysis of perifocal changes allows us to differentiate the stage of hemorrhage. HS in the acute and early subacute stages has a similar MRI semiotics, therefore, it is necessary to assess the complex of perifocal changes, which allows to differentiate these stages, as it is determined in patients examined in the first 48 hours (p < 0.05) and is not observed after two days. SWI analysis makes it possible to differentiate the late subacute stage of hematoma from chronic due to different characteristics of the MR signal, and also allows you to establish the presence of perifocal hemorrhagic impregnation, which contributes to the differential diagnosis of hemorrhage in the early stages of the pathological process.
