From 1980 to 1987 we analyzed prospectively 30 cases of abnormal cytology at the Hospital Civil de Guadalajara without colposcopy. We practice cervical biopsy with Schiller test and according to result we practiced cervical conization. The cytologic results analyzed were: class V 20 (66.6%), class IV 6 (20%), persistent class III 2 (6.6%) and class II with clinical lesion suspicious of cancer 2 (6.6%). From all the patients, in 12 (40%) we found invasive cancer so that we didn't practice conization; in 10 patients (33.3%) we found the same results in the biopsies that in the conization, but in 8 patients (26.6%) the conization results were worse than the biopsies. We had one cytology class V false positive.