Total antiradical activity (ARA) of the blood serum, saliva, and gastric juice, level of nonenzymatic antioxidants, and activities of antioxidant enzymes were measured in patients with moderate and severe gastric dysplasia and cancer. Informative laboratory tests are suggested for singling out the high-risk group. Evaluation of the serum ARA, tocopherol, retinol, and superoxide dismutase/glutathion peroxidase coefficient helps detect patients with gastric cancer at a high risk of postoperative complications.
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