Endothelial dysfunction (ED) is common in acute leukemia patients. The study of ED can provide more information about pathological processes in lungs of children with acute lymphoblastic leukemia (ALL). The purpose of the study is to assess the levels of vascular endothelial growth factor A (VEGF-A) and its prognostic value for pulmonary complications in children with ALL. We examined 40 children with ALL aged 6 - 17 years. Group 1 included children with newly diagnosed ALL (n = 18), group 2 involved ALL survivors, who had completed the total course of chemotherapy (n = 22). The control group consisted of 15 healthy children. The level of VEGF-A in serum was assessed by enzyme-linked immunosorbent assay. Conclusions: children with ALL have significant ED. The level of serum VEGF-A can be predictive for pulmonary complications in ALL survivors.

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