The authors made a review of the last 100 cases who underwent a conization of the cervix during the period 1980-1986. Cyto-histological evaluation was compatible in 78% of the cases with a cervical intraepithelial neoplasia of third degree and in 22% with a CIN of first and second degree. Early post-operative complications consisted of a hemorrhage in 3% of the cases, easily stopped with a vaginal packing. In 2% of the cases a risuture under general anaesthesia was required. In 1 case the stitches loosened and in another a urinary infection was present. Twenty-six patients underwent total hysterectomy after conization for different indications; only one patient had a relapse after six months as there was a moderate dysplasia localized in the vaginal vault. During the follow-up, 14 patient became pregnant. Among these, 5 underwent legal termination during the first trimester and 9 delivered at term without any complication. During these follow-up of 7 years in the older cases and 6 months in the more recent ones, 6 cases displayed a persistence of the disease after 3 months, (CIN of variable degree) and 2 cases relapsed at the second colpocytological control. These patients, according to the age and the presence of clinical indications, underwent total hysterectomy or diathermic coagulation with resolution of the disease. A relapsing invasive tumor was never observed.)