[Disorders of immune homeostasis in patients with tumors of the gastrointestinal tract].

To study immune homeostasis status and to improve the diagnostic value of immunological tests in healthy donors and patients with benign and malignant gastrointestinal tumors, 13 clinico-immunological parameters were identified and measured simultaneously in most of the examinees. A new method of analysis of clinico-immunological information based on stage-by-stage visual evaluation of data shown on dispersion programs and identification of areas corresponding to "normal" immune homeostasis is suggested. Data obtained simultaneously from blastogenic reaction of lymphocytes, cytotoxic test for levels of natural killers in blood and tests for determining subpopulational levels of T-lymphocytes were shown to be diagnostically valuable.