In the blood serum of 71 patients before treatment with cervical carcinoma and in 100 healthy women from the health services working staff, the occurrence of circulating immunologic complexes (CI) has been estimated applying the rosette EA and EAC inhibition test. The presence of CI has been proved and the frequency of positive results increases together with the stage of advancement of the neoplastic process. It appears that the CI examination should be regarded as a significant parameter in monitoring the course of treatment.