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Cellular mediated immune reactions (CMI) against tumour associated antigens are the demonstration of an interrelationship between tumour and tumour host. They are related to the stage and prognosis of the disease. 41 patients with cervical cancer were tested by leukocyte-migration-inhibition test. Cryostat sections of 10 micron of the tumour-tissue, gained by excision or curettage and histologically defined, were taken as tumour antigens. The test was performed in Sykes-Moore-Chamber as so-called one-way-test with the lymphocytes/leukocytes and macrophagen of the tumour patient. Reactions against autologous and homologous tumour tissue and against recall antigens (tuberculin and varidase) were tested. There was no overall diminution of cellular mediated immune reactions. CMI was demonstrated in 69.7% (inhibition in 30.3%, stimulation in 39.4%) in the autologous and in 51.3% in the homologous system (21.6% inhibition, 29.7% stimulation).