Changes of cytochemical indices and phagocytic activity of neutrophil granulocytes of the peripheral blood were revealed in patients with cancer of the rectum at different stages of combined treatment. These changes evidence an increase of vascular permeability and catabolism, disorders of energy resources, oxidation-reduction processes and functional activity of granulocytes. The dynamics of changes of cytochemical indices of leucocytes reflect the efficacy of different methods of treatment and prophylaxis of postoperative purulent complications.
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