Objective. To identify electroencephalographic predictors of symptomatic seizure in children and adolescent with lymphoid tumors during chemotherapy.Material and methods. EEG results of a study in 20 children aged 7 to 15 years with lymphoid tumors during chemotherapy under the В-NHLBFM-90/95 и ALL IC-BFM 2002 program are presented. Depending on the presence of clinical manifestations, patients were divided into groups: 1st group (n = 10 without epileptiform signs), 2nd group (n = 10 with epileptiform signs).Results. In patients of group 1, who did not have clinical manifestations (seizures), the EEG recorded a signifiantly better, compared with patients of group 2, spectral dencity in band alpha rhythm and sensorimotor rhythm (p < 0.001) and signifiantly less delta activity and beta frequencies (p < 0.001). It was found that, despite the absence of epileptiform signs in the EEG, these patients had fewer EEG correlates of the ‘spike-wave’ complexes, and signifiantly less power levels of delta and beta-2 frequency bands (p < 0.001).Conclusions. The use of comparative EEG mapping made it possible to identify predictors of epileptiform activity in children and adolescents with lymphoid tumors during chemotherapy.

Takayasu’s arteritis (TAK) is a systemic large vessel vasculitis that usually develops at young age in females and affects aorta and its branches (pulseless disease). Patients with TAK frequently present with renal artery stenosis associated with renovascular hypertension and ischemic nephropathy, whereas glomerular and interstitial kidney disease is very rare. As any other chronic inflammatory diseases, TAK can be complicated with AA-amyloidosis manifesting by progressive proteinuria, nephrotic syndrome and chronic renal failure. AA-amyloidosis in patients with TAK and other immune-mediated inflammatory disease justifies intensification of immunosuppressive and antiinflammatory therapy (e.g. using interleukin-6 inhibitors) that is essential to prevent progression of kidney amiloidosis.