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Results of Conservative Management of Cervical Intraepithelial Neoplasia

From The University of Britisli Columbia and the British Columbia Cancer Agency, Vancouver, British Columbia, Canada

Abstract

Cryotherapy and laser surgery have been the most frequently used conservative methods to treat cervical intraepithelial neoplasia (CIN) in the past decade. This report documents our experience using these modalities to treat 2773 patients between the years 1984-1989. One thousand eight hundred eleven women received laser surgery and the remaining 962 were treated with cryotherapy. In the first 2 years of the study period, only 78 patients were treated with laser surgery. Conversely, only 69 of the 979 patients treated in 1988 and 1989 had cryotherapy. As greater experience was gained with laser surgery, the success rates rose from 58.3% in 1984 to 95.5% in 1988. The success rate was similar for all grades of CIN. Overall, 11.2% of all patients were lost to follow-up. Among patients treated with laser surgery, 4.8% had postoperative bleeding that required either packing or, in two instances, sutures for hemostasis. Success with these methods appeared to be related to the size of lesion and not to the degree of histologic abnormality. The shift toward increasing use of laser surgery in our clinic was due to its precision in destroying identified lesions in the transformation zone. Our results indicate that both cryotherapy and laser surgery are simple, effective methods for the treatment of CIN.

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