A retrospective morphological research is made on 11 patients with squamous cell carcinoma of the cervix for a three-years period of time (1995-1997). Preoperative radiotherapy (intracavitary radiotherapy with Cs and/or external radiation) is carried out. A control group of 10 patients with cancer of uterine cervix without preoperative radiotherapy is also studied. All of the women undergo a wider hysterectomy by the method of Piver class IV. The radiation alterations in the tumor and the surrounding normal uterine tissues are also researched. A full regression of the tumor Ts size. There are demonstrative changes in the tumor and surrounding normal tissues, which are the prove the answer to the ionizing irradiation.