In Cuba, the cervical cancer constitutes an important problem of health for its high indexes of morbi-mortality and emotional impact in the population. In the handling of the women with their lesions precursors, the objective consists on preventing the possible progression to cancer invader without sobretratar the lesions with high regression probabilities. Along the time different treatments and protocols have been proven in order to obtaining the best results in the control of this pathology with conservative techniques, in the face of the growing incidence in patient without satisfied parity and minimizing the possibility of residual illness. It was carried out a prospective descriptive study to determine the relationship between the diagnosis of residual illness and clinical-epidemic factors in 428 patients with lesions cervical epithelial of high degree that were conization in the Hospital General Educational Heroes of the Baire during the period 2014-2016. 53% of the studied patients was bigger than 35 years of age, 74% had one or two children, 20% smoked, 38% had an initial cytology of high degree, 46% they had a lesion with an area of 100-199mm2, 90% they were conization for handle diathermic and 29% they were conization for not correlation diagnostics. The surgical margins affected by lesion, the carcinoma histology in situ or micro invader, the area of more lesion 199mm2 and the glandular lesions of the cervical channel constituted factors predictors of residual illness. The presence of these factors predictors meant 79,6% of probability of appearance of residual lesion.