According to our study, diseases of the nose and paranasal sinuses were found in 59.4% of patients with acute and chronic leukemias. In chronic leukemia purulentinflammatory diseases had abortive clinical manifestation. In acute leukemia, especially during the induction of remission, purulentinflammatory diseases of the nose and paranasal sinuses were associated with significant signs of purulent process. Inflammatory diseases of the paranasal sinuses are manifested by pronounced shift of hematological indices of intoxication that indicates increase of autointoxication, disturbance of adaptation mechanisms and transition of adaptivecompensatory immunological reactions in damaging ones., Shakhlo Bakieva, and Literatura