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Understanding mechanisms of chemotherapy cardiotoxicity is an important problem due to the lack of clear understanding of its occurrence. Development of endothelial dysfunction is considered to be one of possible ways in implementation of these side effects. The analysis of endothelin-1 and e-selectin levels in 26  patients with lymphoproliferative diseases before and after the completion of the treatment program was been performed. The results of the study showed normal values of E-selectin level and increased level of endothelin-1 in the whole group of patients before treatment. After completion of chemotherapy program, in the whole group, there was a decrease of these two markers. However, values of level of endothelin-1 with vasoconstrictor effect remained high even after the end of therapy. It is imp ortant that at detailed analysis the dynamics of investigated markers in patients of older age group (median age 64 years) was associated with worsening of endothelial dysfunction.

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Inhibitory coagulopathy is a rare variant of hemorrhagic syndrome. Acquired hemophilia A is caused by the formation of inhibitors (antibodies) to Factor VIII of the blood coagulation system leading to impaired activation of the key stage of blood clotting (factor X) and development of hemorrhagic syndrome of different severity. Acquired hemophilia A is a rare disease with an incidence of 1.38-1.48 per 1 million population per year. We report a case off severe idiopathic acquired hemophilia A in a 53 year-old woman manifest as skin hemorrhages, subcutaneous and intramuscular hematomas. Hemostatic therapy described in the article resulted in the elimination of hemorrhagic syndrome and complete remission. This case represents a rare disease the knowledge of which can be useful for preventing the development of debilitating complications, and sometimes saving the patient’s life.