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Objective:To assess the factors related to the cone marginal status of patients with cervical intraepithelial neo-plasia Ⅲ(CINⅢ)after conization.Method:A retrospective analysis of consecutive patients with CIN Ⅲ accepted conization between Jan.1st 1999 and Dec 31th 2004 was performed.To assess the relationships between the positive margin of conization of the pa-tients with cervical intraepithelial neoplasia Ⅲ and the patient's age,size of lesion and the operator.To assess the management of the positive cone margin and follow-up of the patient with CIN Ⅲ.Results:361 patients first accepted conization.Among them were 58 patients(16.1%)with positive cone mar-gin.There was no difference in the positive margin of conization in the different age groups,size of lesions and oper-ators.The rate of positive margin of conization was 14.3% with the surgeon of the gynecological oncologist,and the 20.4 % with the non-gynecological oncologist.The rate of the follow-up was 70%.According to the rate of the ab-normal cytology of follow-up,the positive margin of conization was 21.4%,and the negative margin of conization was 10.6%,there was no significant difference.Conclusion:The status of the resection margin of the conization may be related to the surgical skill.The patients with CINⅢ should be accepted a regular postoperative follow up,especially the patients with positive margin.